Does the EVA valuation model explain the market value of equity better under changing required return than constant required return?

Behera, Sujata Article Does the EVA valuation model explain the market value of equity better under changing required return than constant required return? Financial Innovation Provided in Cooperation with: Springer Nature Suggested Citation: Behera, Sujata (2020) : Does the EVA valuation model explain the market value of equity better under changing required return than constant required return?, Financial Innovation, ISSN 2199-4730, Springer, Heidelberg, Vol. 6, Iss. 1, pp. 1-23, https://doi.org/10.1186/s40854-019-0167-8 This Version is available at: https://hdl.handle.net/10419/237195 Standard-Nutzungsbedingungen: Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden. Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen. 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Sujata Behera Correspondence: sujatadalai2014@ gmail.com Institute of Management, Nirma University, B-301 Aditya Greens, Near Sahajanand City Bunglow, Near Sona Cross Road, New C. G Road, S.G. Highway, Ahmedabad, Gujarat 382424, India Abstract Through the Economic-Value-Added (EVA) valuation model, the expected market value of equity can be determined by adding the book value of equity with the present value of expected EVAs under the assumption of constant required return and constant return on equity. The equation of EVA valuation model has taken its shape under the assumption of constant required return and constant return on equity. However, a large body of empirical evidence indicates that required rate of return never remain constant. The EVAvaluation model formulated under constant required return cannot be implemented under the scenario of changing required return. In this study, we explored whether the EVA valuation model could be implemented under changing required return by making any changes in the model and found that it could be implemented under the scenario of changing required return by replacing the book value of the equity of the existing model with the present value of required earnings or normal market earnings. We further examined whether the explanatory ability of the EVA valuation model under the assumption of changing required return is better than that of the valuation model under the assumption of constant required return. Relative information content analyses were conducted by considering sample of the intrinsic value of equities determined by valuation models and the market value of equities of 69 large-cap, 88 mid-cap, and 79 small-cap companies. The results showed that the EVA-based valuation model with changing normal market return outperformed the EVA-based valuation model with constant required return. Keywords: Economic value added (EVA), Capital asset pricing model (CAPM), Expected market value of equity under constant required return (EMVEUCRR), Expected market value of equity under varying required return (EMVEUVRR) Introduction Valuation is an important topic in finance, as it is needed for companies to get their equity capital valued for purposes such as borrowing, merging, acquiring, and making public offerings. The importance of valuation in attracting foreign investments has grown in emerging economies such as that of India. Even so, the rising globalization, market liberalization, and drastic competition have made it difficult for academics, © The Author(s). 2020 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Financia l Innovation Behera Financial Innovation (2020) 6:9 https://doi.org/10.1186/s40854-019-0167-8 practitioners, company owners, managers, and consulting firms to accurately estimate the value of equity. The shareholders’value theory places shareholders at the top of a hierarchy in analyzing the economic performance of a business. The EVA is a modified version of the shareholders’value theory (Banerjee, 2000). The selling point of EVA is that it increases stock return. It also stands out from the crowd for its association with stock prices. As such, EVA gained popularity toward the end of the twentieth century, most notably when the executives of big companies such as AT&T and Coca-Cola publicly declared that a 27% rise in EVA performance increased stock return by about 200% (Chen and Dodd, 1997). Moreover, an article in Fortune magazine praising EVA as a measure of corporate success attracted a flurry of research papers that detailed EVA success stories and promoted EVA adoption (Chen and Dodd, 1997). A huge body of literature isnow available on success stories of the EVA model. EVA performs better than accounting measures in explaining stock return (Behera, 2019; Gounder and Venkateshwarlu, 2017; Khan et al., 2016; Ahmed, 2015; Bhasin, 2013; Zhao and Wang, 2012; Worthington and West, 2004; Misra and Kanwal, 2007; Singh, 2005; Lefkowitz, 1999; Saxena, 1998; Easton et al., 1992). EVA advocates have claimed that upward and downward trends in stock prices are strongly associated with EVA. Some found that EVA could be used to more accurately determine the intrinsic value of equity by adding the book value of equity with the present value of EVAs under the assumption of constant required return and constant return on equity (Stewart, 1991). Later, O'Byrne et al. (1996)found that EVA better predicted the expected marketvalueofequitybyaddingthebook value of equity capital, the perpetual value of the current EVA, and the present value of the perpetual value of incremental EVAs generated by future invested capitals under the assumption of constant required return and constant return on invested capital. Despite these success stories of using EVA as performance measurement metric, little attention has been paid to examining the efficiency of the EVA valuation model. Using an EVA valuation model formulated with the assumption of constant normal market return raises the question of whether the normal market return remains constant. Growing empirical evidence hints at the volatility of financial return and emphasizes that therelativeimportanceofthevolatilecomponent of competitive advantage rises when compared to the long-run component of the sustainable competitive advantage (Thomas and D’Aveni, 2009). Normal market return never remains constant, and asset values are better explained under time-varying discount rates than under constant required return (Campbell and Mei, 1993; Mei and Lee, 1994; Ahrendsen and Khoju, 1994; Geltner and Mei, 1995; Saha and Malkiel, 2012; McLemore et al. 2015;GelterandMei,1995;Ang and Liu, 2003). Similarly, D’Aveni et al. (2010) explained that the environment has become more dynamic and disruptive because of technological change, globalization, industrial convergence, aggressive competitive behavior, deregulation, the privatization movement stimulated by government or hedge funds, government subsidiaries, the rise of emerging economy, and global political instability. The drastic competitive actions and counter responses among rivals have increased the volatility of financial returns. In the current market scenario, expecting constant return on investment equity capital is unrealistic. Thus, an EVA valuation model that Behera Financial Innovation (2020) 6:9 Page 2 of 23 operates under the assumption of constant required return and constant return on equity cannot be implemented under the scenario of a changing required return. To address the above limitations, we first posited that the book value of equity of the existing EVA-based valuation model needs to be replaced with the present value of normal market earnings in order to implement the valuation model under the scenario of changing required return. Next, we examined whether the assumption of changing the normal market return leads to a better estimation of the intrinsic value. Therefore, this study compared the explanatory ability of the EVA-based valuation model operating under a changing required return with the explanatory ability of the existing EVAvaluation model that operates under a constant required return. To stay focused on the objective, this study did not include a deeper discussion on how the discount rate changes over time. We made this choice because finance is all about practical application, not just deep explanation (Cochrane, 2011). Moreover, discount return variation can significantly change application (Cochrane, 2011). We determined the required rate of return or normal market return in two different ways: a static estimate with no variation in risk-free return, the market premium, and the beta over the periods of each company; and a variable estimate with periodic variation in risk-free return, the market premium, and the beta. For better exposition, this study considered sample data from over 15 years (from 2002 to 2003 to 2016–2017) of 69 large-cap, 88 mid-cap, and 79 small-cap companies, and included a relative information content analysis. The results of the analysis indicated that the explanatory ability of the EVA-based valuation model is better under changing required return than under constant required return. The rest of this paper is organized as follows. Section 2 describes the existing literature on EVA and the gap. Section 3 discusses the derivation process of EVA and the EVA valuation model. Section 4 includes our hypothesis. Section 5 covers the data source and sample selection. Section 6 reports the results and focuses on the overall discussion. Section 7 provides the conclusion. Literature review Value is the primary concern of investors and managers. Performance measures play an important role in creating value for organizations. However, it is a difficult task for management to select an appropriate performance measure that accurately measures the performance of the organization over a specific period of time. Traditional accounting measures have been roundly criticized for not considering the total cost of capital. To overcome this limitation, Stewart (1991) proposed the concept of EVA, which is unique in the market because it considers the cost of capital. It determines extra earnings over normal market earnings or required earnings with the objective of evaluating the performance of company with respect to the market over a specific period of time, where normal market earning is determined by multiplying the normal market return with the book value of invested capital. Moreover, EVA compares company-specific earnings with required earnings or normal market earnings. Therefore, an adjustment to one comparable factor of EVA (as suggested by Stewart in 1991) may cause an imbalance in the comparative ability of earnings and normal market earnings, which can in turn reduce accuracy. Thus, it is necessary to ensure the calculation of the cost of capital and adjustments to the accounting profit in such a manner that year-to-year Behera Financial Innovation (2020) 6:9 Page 3 of 23 comparison accurately measures the performance (Chamberlain and Campbell, 1995). To calculate EVA accurately, actual accounting earnings should be considered instead of adjusted operational earnings (Young, 1999; Chen and Dodd, 1997; and Raman, 2004). Accounting earnings explain the equity return and market value of equity better than adjusted net operational earnings (Biddle et al. 1997; Dodd and Chen, 1997; and Ramana, 2005). There is no theoretical or empirical evidence to suggest that EVA adjustments can convert an incorrect accounting number into a correct estimated value, just as there is no economic theory guiding the selection of the most relevant accounting variables to adjusted (Anderson et al., 2004). EVA adjustments make EVA too complex, and it is easily manipulated (Azamhuzjaev and Mackey, 2001). In addition, adjustments to net operating income may remove accruals that are used by the market to find the future prospectus of companies (Biddle et al., 1997). The data necessary to make the adjustments are difficult to obtain (Petersons and Peterson, 1996). Moreover, the results of adjustments depend on assumptions and judgments, which can vary from company to company, making it difficult to conduct reliable comparisons (Cates, 1997). In this study, we attempted to incorporate the suggestions of the above researchersbyconsideringtheaccountingrate of return on the book value of equity in place of the adjusted operating rate of return. To keep normal market return at the same level as the accounting rate of return, we used the capital asset pricing model (CAPM) model, with some variation to compute required rate of return/normal market return. Instead of using annual capital growth rate as “r m ,”this study considered the accounting return on the book value of equity of SENSEX as “r m .” Several studies have been conducted on EVA during the last two-and-half decades to examine its efficiency as a periodic performance measure. Behera (2019) conducted a study on 69 large-cap companies selected from the BSE 500 and compared the efficiency of EVA with accounting measures in explaining stock prices. The results showed that EVA maintained a strong association with the stock price and yielded incremental information content beyond that provided by other accounting measures. Similarly, Ellanti (2016) conducted a study by considering 197 sample companies from BSE over the period of 2010–2014 using a univariate linear regression and multiple regression analyses. Khan et al. (2016) conducted a study that considered samples selected from 28 non-financial firms listed in the Karachi Stock Exchange and found that EVA availed incremental information content beyond the information content given by earnings. Ahmed (2015) conducted a study on five Bangladeshi companies and found that EVA maintained a significant association with stock price. Similarly, Bhasin (2013) examined five Indian companies through data from 2006 to 2007 through 2010–2011 and found that the explanatory ability of EVA was better than that of traditional performance measures. Kumar and Sharma (2011) considered a sample from the BT 500 and reported that EVA had incremental information content in addition to the information content of the earnings. Mishra and Kanwal (2005) examined the relationship between share price between EVA and traditional measures using BSE-100 companies from 1998 to 2003 and concluded that EVA maintained a better association with share price compared to traditional measures. EVA proponents have claimed that EVA is the only performance measure directly tied with a stock’s intrinsic value (Stewart, 1991). Successful stories of well-known Behera Financial Innovation (2020) 6:9 Page 4 of 23 companies such as AT&T, Briggs & Stratton, Chrysler, Compaq, GE, Quaker Oats, and Scott Paper have popularized EVA (Tully, 1993) Large-, mid-, and small-cap companies that have been attracted by all these success stories have adopted EVA. More than 300 companies, each with revenues approaching one trillion dollars annually, have implemented EVA as a financial performance measurement tool (Ehrbar, 1998). The reason for this trend is that EVA motivates companies to find ways of increasing the efficiency of capital utilization and can consequently bring about a superior stock performance (Tully, 1993). Tully (1993) explained that EVA has been gaining in popularity since September 1993 following an article in Fortune magazine that strongly praised EVA as an exciting innovation that could measure corporate success. Similarly, O'Byrne et al. (1996) advocated that EVA, unlike NOPAT and other accounting measures, is systematically linked to market value. EVA advocates have also claimed that the measure can motivate companies to find ways of increasing capital utilization and bring stock performance. For example, Chen and Dodd (1997) used the Stern Stewart database, containing EVA performance on 1000 leading U.S. companies, and found that EVA had better explanatory ability than regular accounting measures. Lehn and Makhija (1997) conducted a study of 241 U.S. companies over the periods 1987–1988 and 1992–1993 and observed that both MVA and EVA were positively correlated with stock returns; moreover, the correlation of EVA with stock return was marginally better than that for accounting measures. EVA explains market value better than accounting measures (Kukreja and Giridhar, 2005; Mangala and Joura, 2002; Singh and Garg, 2004; Singh and Mehta, 2012). Its adoption also helps companies increase their stock price (Ethiraj, 1998). Banerjee (2000) conducted a study of 200 Indian companies across industries using a sample over the period of 1993–1998 and observed that the market value of firm could be well predicted by the discounted value of expected EVAs. The popularity of EVA has notably increased in India. Here, companies including Infosys Technologies, BPL, HUL, NIIT, TCS, Godrej Consumers Product Limited, Ranbaxy Laboratories Ltd., and Samtel India Limited have all reported EVA in their financial statements. EVA not only more accurately measures the performance of a company but also predicts the market value of equity by adding the book value of equity with the present value of expected EVAs under the assumption of constant required return and constant return on equity (Stewart, 1991). Despite a huge body of literature claiming that EVA has a strong association with stock value, very little study has been conducted on a suggested EVA-based valuation model. A valuation model plays a vital role in determining the time of buying and selling investor securities. Fundamentally, analysts believe that intrinsic values, which aid in the process of borrowing, merging, and acquiring, determined by valuation models are the actual value of equity. Higher and lower intrinsic values indicate corporate performance. As a developing country, India is in great need of a proper valuation model to attract foreign funding. Therefore, implementing a proper valuation model is highly important. The growing popularity of EVA in India and the growing need for a proper valuation model encouraged us to focus our study on EVA-based valuation. The EVA-based valuation model is derived from the addition of the current operational value and the future growth value, where the future growth value is the present value of incremental EVAs generated by future invested capitals (O'Byrne et al., 1996). Moreover, both the current Behera Financial Innovation (2020) 6:9 Page 5 of 23 operational value and the future growth value are derived from Modigliani and Miller’s equations, proposed in 1961. The current operational value, e, was derived from the first part of Modigliani and Miller’s equation, which is NOPAT/C; the future growth value was derived from the second part of the equation, which is ∑[I(r-c)/c]/(1 + c) t .In this equation, r is the return on new invested capital, c is the weighted average cost of capital, and I is the new invested capital. O'Byrne et al. (1996) suggested that the expected market value can be determined by adding the book value of invested capital, the perpetual value of the current EVA, and the present value of capitalized incremental EVAs expected to be generated by future invested capital under the assumption of a constant normal market return and a constant return on invested capital. The assumption of a constant normal market return and a constant return on equity of existing EVA-based valuation raises the following questions: 1. Does normal market return remain constant? 2. Do corporations provide a constant return to their investors? There is growing empirical evidence to suggest that the volatility of financial returns is increasing. Most literature supports the presence of high competition, the volatility of financial returns, and the volatile component of competitive advantage, and it suggests that a sustainable advantage does not necessarily exist, except dynamic capabilities and organization flexibility can occasionally be sources of a sustainable advantage (D’Aveni et al., 2010). Thomas and D’Aveni (2009) used different methods that decomposed accounting returns into longand short-term components and observed that the volatility of performance increased in the U.S. over time. They also found that volatility of returns rose from 1950 to 2002 for all traded U.S. manufacturing firms. Furthermore, volatility has been found to rise in earnings, sales, employment growth, capital expenditure, and the total factor of productivity (Comin and Mulani, 2006; Comin and Philippon, 2005). Severens and Milen (2004) explained that the consistent principle for finding the discounting factor internationally or nationally is imperative (Campbell et al., 2001). Similarly, Irvine and Pontiff (2009) reported the increasing of volatility of abnormal returns for U.S. equity return. Thus, it is difficult to expect a constant return on equity in a dynamic market. Cohen et al. (1997) found that inflation, even at its relatively low current rates, continues to increase the cost of capital (required return). In addition, a number of studies strongly rejected the repeated discounting of health effects (Attema, 2012 and Bleichrodt et al. 2016). Feldstein (1983) explained that increasing inflation results in a decreasing discount rate, which in turn leads to an increase in the value of an asset. Turvey et al. (1995) stated that the cost of capital never remains constant because of the changing economy and expressed concern about the assumption of a constant discount rate. Fama and French (1988) explained that time-varying discount rates are consistent with investors’preference for current against future consumption and the stochastic evolution of their investment opportunities. There is evidence to support the notion that a changing discount rate predicts the market value of equity better than a constant discount rate. Geltner and Mei (1995) found that the explanatory ability of the discounted cash flow model was better under a changing required return than under a constant required return. McLemore et al. (2015) implemented a dividend model using a time-varying discount rate and concluded that it reduced the prediction error when market volatility increased. Attema et al. (2018) argued that after summarizing the theoretical foundations of discounting Behera Financial Innovation (2020) 6:9 Page 6 of 23 in health care economic evaluations, people should be more cautious about applying equal discounting of costs and effects, particularly when the value of health is expected to change over time. Campbell and Mei (1993) explained that changes in the stock process are due to changes in total required returns rather than to changes in the market’s cash flow expectations. Similarly, Hodrock (1992) and Keim and Stambaugh (1986) used interest rate variables to explain that stock returns are predictable. Likewise, Saha and Malkiel (2012) examined and inferred that time-varying discount rates, which are appropriate in valuing U. S start-up firms, were considerably higher than those in traditional discounted cash flow models. Campbell et al. (2018) assumed that variables such as cash flow and discount rate components followed the same volatility dynamics, which govern the conditional variance of market return. Cenesizoglu and Ibrushi (2017) explained that the contribution of discount rate news varies between 24% and 65%, whereas that of cash flow news varies between 15% and 61% and is relatively less volatile. They also explained that components of market return, including cash flow and discount rate news, may also have time-varying conditional variances and covariance. Campbell et al. (2013) explained that positive revisions in return expectations resulted in the downturn of 2001. Moreover, four variables (i.e., industrial product index, producer price index, unemployment rate, and total nonfarm payroll) were found to be important determinants of market return volatility (Engle et al.2013). Ahrendsen and Khoju (1994) rejected the assumption of a constant discount rate. Falk (1991) described that excess volatility in farm asset values may be better explained by time-varying discount rates. Campbell and Mei (1993) reported that changes in stock prices over time happen because of changes in the market’s required return, including capital return. Most of the changes in commercial property market value have been due to changes in expected returns or discount rates rather than changes in expected future operating cash flow (Geltner and Mei, 1995). Tiwari (1994) elucidated that opportunity costs may change because of changing economy, and using a single discount rate (estimated either by any of the measures of central tendency or by econometric methods) may not be appropriate as it can overestimate or underestimate the expected market value of equity under variable market rate conditions. Therefore, it is more appropriate to use multiple single-period rates as discounting factors rather than a single rate (Tiwari, 1994). Today, the market is dynamic because of the presence of globalization, aggressive competition, and the pressure of short-term incentives for senior executives to produce results. In a dynamic market, a constant return on equity or a constant normal market return cannot be expected. Studies have also supported the notion that the required return changes because of changing inflation and a changing economy. Studies conducted on other valuation models indicated that valuation models under a changing required return better explain the market value of equities than a constant required return. As the existing EVA-based valuation model suggested under the assumption of constant required return cannot be implemented under changing required return, this study first focused on how to implement an EVA-based valuation model under changing required return. Then, it focused on comparing the explanatory ability of the EVA-based valuation model suggested under changing required return with that of the traditional EVA-based valuation model operating under constant required return. Behera Financial Innovation (2020) 6:9 Page 7 of 23 EVA and EVA valuation model Eva EVA evaluates financial performance of specific company by comparing (deducting) required earnings with company specific earnings. The following equation represents the suggested method of finding EVA. EVA ¼NOPAT−WACCTCE ð1Þ Where, NOPAT is the net operating profit after interest, WACC is the weighted average cost of capital, and TCE is the total capital employed. WACC ¼IdWdþreWeð2Þ Where I d is the interest on debt capital after tax; r e is the required rate of return; Wd is the weightage of debt capital (debt capital/ TCE); and We is the weightage of equity capital (book value of equity/TCE). Therefore, EVA ¼NOPAT−IdWdþreWe ðÞTCE ¼NOPAT−IdWdTCE þreWeTCEðÞ ¼NOPAT−IdWdTCEðÞþreWeTCEðÞ fg WdTCE ¼debt capital=TCEðÞTCE fg ¼debt capital In addition, We* TCE = (BVE / TCE)* TCE = BVE, where BVE is the book value of equity. Thus, EVA ¼NOPAT−Iddebt capital þreBVEðÞ ¼NOPAT Iddebt capitalðÞ−reBVE ¼PAIT−reBVE ¼rBVE−reBVE ¼r−reðÞBVE Where PAIT is the profit after interest and tax, PAIT is r* book value of equity, and r is the return on the book value of equity. EVA-based valuation model O'Byrne et al. (1996) clearly indicated that EVA based valuation model had been derived from the addition of current operation value and future growth value. The equations elaborate the derivation process of EVA based valuation model. EMVE ¼COV þFGV ð3Þ Where COV is the current operational value; FGV is the future growth value; and COV is the PV of the PAIT expected to be generated by the current invested capital. In addition, FGV = PV of ΔEVAs generated by future invested capital, where PV is the present value, and ΔEVAs represent incremental EVAs. Deriving the EVA-based valuation model under no assumption The analysis started with PAIT. After deducting and adding re* BVE to PAIT, PAIT remained unchanged: Behera Financial Innovation (2020) 6:9 Page 8 of 23 correlation coefficient of the intrinsic or expected market value of the equities determined by the EVA-based valuation model under the assumption of constant required return (87.2%) was lower than the correlation coefficient of the intrinsic value determined by the EVA-based valuation model under the assumption of changing required return (80.5%). Furthermore, the intrinsic value of equities determined by the EVAbased valuation model under the assumption of constant required return for large-cap companies explained a 64.7% variance in its actual average market value of equities. In contrast, the intrinsic value of the equities determined by the EVA-based valuation model under the assumption of changing required return explained 75.9% variance in the actual market value of equities. Thus, the explanatory ability of the EVA-based valuation model under a changing required return was 11.2% higher than the explanatory ability of the valuation model under the assumption of constant required return. For mid-cap companies, Durbin-Watson’s number indicated the absence of autocorrelation, as it remained closer to or within the upper and lower limits of 1.5 and 2. In addition, the F-values, 452.290 and 212.794, and the p-value, 0.000, indicated that the association of intrinsic values of equities determined by the EVA-based valuation model under the assumption of a constant and changing required return with the market value of equities was significant, at less than 0.001. Furthermore, as panel B in Table 1 indicates, the intrinsic values of equities determined by the EVA-based valuation model under both the assumptions were positively correlated with the market value of equities. The expected/intrinsic value of equities determined by the EVA-based valuation model under the assumption of a changing required return explained the 65.9% variation in the actual market value of equity. In contrast, the intrinsic value of equities determined by the EVA-based valuation model under a constant required return explained the 47.5% variance in the market value of equities. Thus, the explanatory ability of the EVA-based valuation model under the assumption of a changing required return was 18.4% higher than that of the model under a constant required return. In small-cap companies, Durbin-Watson’s number indicated the lower-level presence of autocorrelation. The F-values, 227.028 and 77.037, and the p-value, 0.000, signaled the significance of the association of the intrinsic value of equities determined using the EVA valuation model under the assumption of constant and changing required return at less than 0.001. Moreover, the expected market value of the equity determined under changing required return explained the 53.3% variation in the actual market value of equity. In contrast, the expected market value of equities determined by the valuation model under constant required return explained the 14.3% variation in the actual market value of equity. Thus, the explanatory ability of the EVA-based valuation model under the assumption of changing required return was 6.2% higher than that of the EVA-based valuation model under the assumption of constant required return. The above result rejected Hypothesis 1, as Pearson’s correlation and the coefficient of determination between the expected market value of equities determined by the EVA valuation model under the assumption of constant required return and the market value of equities remained lower than that between the expected market value of equities determined by the EVA valuation model under the scenario of changing required return and market value of equities. It indicates that explanatory ability of EVA based valuation model under changing required return is better than the explanatory ability of EVA based valuation model under Behera Financial Innovation (2020) 6:9 Page 15 of 23 constant required return. Thus, we accepted hypothesis 2 and proved the validity of hypothesis 2. Table 1: Results of regression analysis conducted on 69 large-cap, 88-mid cap, and 79 small-cap companies considering 192 samples of the expected market value of equities, 235 samples of the expected market value of equity variables, and 201 samples of the expected market value of equities determined by the EVA-based valuation model under each of the assumptions along with market value of equities of respective companies over the period of 2002–2003 through 2016–2017. EVME UVRR represents the expected market value of equities under variable required return, EVMEUCRR represents the expected market value of equities under constant required return, and EMVEUVRR stands for the expected market value of equities. Relative analysis over the years Table 2shows the results of regression analyses conducted on selected samples (independent and dependent variables) of large-cap, mid-cap, and small-cap companies on a yearly basis. The independent variables represent the expected market value of equities determined by the EVA valuation model under the assumption of a constant required return. Table 3presents the results of regression analysis conducted between the market value of equities and the expected market value of equities determined under the assumption of a changing required return. In both the tables, samples of large-cap companies comprised 60 independent and dependent variables for 2013, 68 independent and dependent variables determined for 2008, and 67 independent variable and dependent variables for 2003. Samples of mid-cap companies included 72 independent and dependent variables for 2013, 84 independent and dependent variables for 2008, and 78 independent and dependent variables for 2003. Samples of small-cap companies included 67 independent and dependent variables for 2013, 70 independent and dependent variables for 2008, and 79 independent and dependent variables for 2003. Table 2 EVA Valuation Model under Constant Required Return RR 2 Adjusted R 2 F-Value D-W Sig. Large Cap 2013 0.754 0.568 0.561 76.404 1.546 0.000 2008 0.713 0.508 0.501 68.262 1.426 0.000 2003 0.882 0.778 0.775 217.81 1.741 0.000 Mid Cap 2013 0.471 0.228 0.217 20.723 1.559 0.000 2008 0.651 0.424 0.417 60.390 1.816 0.000 2003 0.832 0.692 0.688 170.89 1.626 0.000 Small Cap 2013 0.429 0.184 0.171 14.645 2.139 0.000 2008 0.521 0.272 0.261 25.36 1.94 0.000 2003 0.693 0.48 0.472 60.97 2.12 0.000 Note: Table 3reports the result of regression analysis between market value of equities and expected market value of equities of large cap, mid cap, and small cap companies determined by EVA based valuation model with a varying required return Behera Financial Innovation (2020) 6:9 Page 16 of 23 In Table 3, Durbin and Watson’s (D-W) numbers for large and mid-cap companies indicated little or no presence of autocorrelation within the samples, whereas for smallcap companies, the D-W number indicated the presence of little autocorrelation within the sample data. In addition, the F-values and the p-value of all large-cap, mid-cap, and small-cap companies (Table 2) indicated that all the expected market values of equities for all the companies were significant, at less than 0.001. As Table 3shows, the D-W numbers of the largeand mid-cap companies for 2003, 2008, and 2013 indicated a virtual absence of autocorrelation, whereas the D-W number indicated a milder presence of autocorrelation with the sample data of small-cap companies. The F-values and pvalues indicated that the expected market value of the equities of large-, mid-, and small-cap companies, as determined by the valuation model with the assumption of varying required return, was significantly associated with the market value of equities. Moreover, the expected market value of the equities of large-cap companies in 2013, as determined under the assumption of a changing required return, explained why there was 20% (76.1% vs. 56.1%) more variance in the market value of equities compared to the expected market value of equities as explained under the assumption of a constant required return. During 2008, the expected market value of equities as determined under a changing required return explained why there was 3.9% (54% vs.50.1%) more variance in the market value of equities compared to the expected market value of equities as explained under a constant required return. In 2003, the expected market value of equities as determined by the valuation model under a changing required return explained the 1.4% (78.9% vs. 77.5%) higher variance compared to the expected market value of equities as explained the under constant required return. Moreover, the expected market value of the equities of mid-cap companies in 2013, as determined under the assumption of a changing required return, explained the 26.5% (48.2% vs. 21.7%) higher variance of the market value of equities compared to the expected market value of equities explained under the assumption of a constant required return. In 2008, the expected market value of the equities determined under a changing required return explained the 12.2% (53.9% vs.41.7%) higher variance in the market value of Table 3 EVA Valuation Model under Changing Required Return RR 2 AdjustedR 2 F-Value D-W Sig. Large Cap 2013 0.875 0.765 0.761 188.625 2.24 0.000 2008 0.739 0.547 0.540 79.539 1.50 0.000 2003 0.890 0.792 0.789 236.388 1.994 0.000 Mid Cap 2013 0.699 0.489 0.482 67.879 1.735 0.000 2008 0.738 0.544 0.539 97.88 1.775 0.000 2003 0.843 0.711 0.707 187.13 1.616 0.000 Small Cap 2013 0.589 0.347 0.337 34.53 2.17 0.000 2008 0.592 0.35 0.341 36.67 1.986 0.000 2003 0.683 0.467 0.459 57.839 2.01 0.000 Note: Table 3reports the result of regression analysis between market value of equities and expected market value of equities of large cap, mid cap, and small cap companies determined by EVA based valuation model with a varying required return Behera Financial Innovation (2020) 6:9 Page 17 of 23 equities compared to the expected market value of equities as explained under a constant required return. In 2003, the expected market value of equities determined by the valuation model under a changing required return explained the 1.9% (70.7% vs. 68.8%) higher variance compared to the expected market value of equities explained under a constant required return. Moreover, the expected market value of equities of small cap companies during 2013 determined under the assumption of changing the required return explained the 16.6% (33.7% vs. 17.1%) higher variance in the market value of equities compared to the expected market value of equities explained under the assumption of constant required return. Similarly, in 2008, the expected market value of equities determined under the changing required return explained the 8% (34.1% vs. 26.1%) higher variance in the market value of the equities compared to the expected market value of equities explained under a constant required return. The above results led us to reject hypothesis 1. Pearson’s correlation and the coefficient of determination between the expected market value of equities determined by the EVA valuation model under the assumption of constant required and market value of equities remained lower than Pearson’s correlation and the coefficient of determination between the expected market value of equities determined by the EVA valuation model under the scenario of changing required and market value of equities. Thus, we accepted hypothesis 2. In 2003, the expected market value of equities determined by the valuation model under a constant required return explained the 1.3% (45.9% vs. 47.2%) higher variance compared to the expected market value of equities explained under changing required return. The result led us to accept hypothesis 1. This was because Pearson’s correlation and the coefficient of determination between the expected market value of equities determined by the EVA valuation model under the assumption of constant required return and market value of equities were higher than those between the expected market value of equities determined by the EVA valuation model under the scenario of changing required return and market value of equities. Discussion The EVA-based valuation model can be used to determine the expected market value of equity by adding the book value of equity with the present value of EVAs under the assumption of constant required return and constant return on equity (Stewart, 1991). Despite a huge body of literature that supports the notion that EVA maintains a strong association with upward and downward trends in stock price, little research has been conducted on the suggested EVA-based valuation model. However, the assumption of constant required return and constant return on equity raise the question whether required rate of return and the return on equity remain constant? A large number of studies have elucidated that the required rate of return does not remain constant. In today’s highly dynamic market (hypercompetitive), achieving and sustaining competitive advantage is difficult (D’Aveni, 1994). Additionally, in dynamic markets, dynamic capabilities are necessary to survive (D'Aveni et al., 2010). Thus, the scenario of hyper competition increases the volatility of return, making it difficult to expect a constant required rate of return and a constant return on invested equity capital. Moreover, the EVA valuation model formulated under the assumption of a constant required return cannot be implemented under the real scenario of a changing required return. Behera Financial Innovation (2020) 6:9 Page 18 of 23 EVA maintains its uniqueness because it considers the cost of capital. Its popularity has increased in countries such as India, where companies including Infosys Technologies, BPL, HUL, NIIT, TCS, Godrej Consumers Product Limited, Ranbaxy Laboratories Ltd., and Samtel India Limited have reported EVA in their financial statements. Researchers in India, such as Behera (2019), Altaf (2016), Pattanayak (2009), Ramadan (2016), Poornima et al. (2015), and Sharma and Kumar (2010), have taken interest in conducting studies on EVA. The existing uniqueness of EVA and the growing popularity of EVA in India encourage us to focus our study on the EVA-based valuation model. In spite of many success stories of EVA adoption, the suggested valuation model cannot be implemented under the current scenario of changing required return. Therefore, we made an attempt to implement the EVA valuation model under the scenario of changing required return. We first attempted to replace the book value of equity of the existing EVA valuation model with the present value of normal market earnings (as normal market earnings are the multiplication of the normal market return with the book value of equity). We kept other part of the model the same as the present value of EVAs; the valuation model can be implemented under changing required return. Finally, this study compared the explanatory ability of the revised EVA-based valuation model under a changing required return with the explanatory ability of the existing EVA-based valuation model under a constant required return by conducting relative information content analyses over the years. The relative analyses conducted over the years indicated that the explanatory ability of EVA valuation model is better under a varying required return than under constant required return. This was because the EVA-based valuation model under changing required return explained the 75.9%, 65.9%, and 53.1% variance in the market value of equity for large-, mid-, and small-cap companies, and the EVAbased valuation model under constant required return explained the 64.7%, 47.5%, and 13.9% variance in the market value of the equity of large-, mid-, and small-cap companies, respectively. Therefore, we rejected hypothesis 1 and accepted hypothesis 2. Furthermore, the results of the relative information content analyses conducted along the years indicated that explanatory ability of the EVA valuation model under the assumption of changing required return is much better than that under the assumption of constant required return for 2013 and 2008. In contrast, the explanatory ability of the valuation model under the scenario of changing required return remained closer to the explanatory ability of the valuation model under a constant required return for 2003. In addition, the explanatory ability of EVA-based valuation under changing required return was much higher in 2013 compared to the explanatory ability of the EVA-based valuation model under a constant required return; it maintained the largest gap between two models across all categories of companies (76.1% vs. 56.1% for large cap, 48.2% vs. 21.7% for mid cap, and 33.7% vs. 17.1% for small cap). The gap between two models was reduced for all categories of companies in 2008. Similarly, in 2003, the explanatory abilities of the two models were close to each other and maintained the smallest gap. It must be noted that to compute the intrinsic value for 2013, we used input data up to 2017, as we wanted to consider the following 4 years’data to find the intrinsic value of each year. This result showed that the revised EVA valuation model responded better to the recent market than to the older market. The revised EVAbased valuation model further clarifies that the present value of EVAs determined the Behera Financial Innovation (2020) 6:9 Page 19 of 23 EVA by deducting the normal market value of equity from the actual market value of equity. This was because EVA can be used to determine economic profit over a specific period by deducting the normal market earnings or required earnings from companyspecific earnings. The normal market value of equity is determined by the present value of normal market earnings. Moreover, EVA valuation model proposed with the assumption of changing required return can be implemented with the assumption of constant required return. Conclusions In this study, the first attempt was made to implement an EVA-based valuation model under the condition of a changing required return and to compare its explanatory ability with the existing EVA-based valuation model under a constant required return. First, we posited that the EVA-based valuation model could be implemented under the scenario of changing required return by adding the present value of the required earnings with the present value of EVAs. Relative information content analyses were conducted over the years to examine whether the explanatory ability of the revised EVA-based valuation model under changing required return is better than that of the existing EVA-based valuation model suggested under constant required rate of return. The study was conducted over the years on large-, mid-, and small-cap companies. It showed that the EVA-based valuation model explained the 75.9%, 65.9%, and 53.1% variance in the market value of equities. In contrast, the EVA-based valuation model under constant required return explained the 64.7%, 47.5%, and 13.9% variance in the market value of equities. This indicated that the explanatory ability of the EVA-based valuation model under changing required return is much better than the explanatory ability of the EVA-based valuation model under a constant required return. Furthermore, the study conducted over 2003, 2008, and 2013 showed that the explanatory ability of the EVA valuation model under a changing required return was the best in 2013, as it maintained the highest gap (76.1% vs. 56.1% for large-cap, 48.2% vs. 21.7% for mid-cap, and 33.7% vs. 17.1% for small-cap companies) in 2008 and was marginally higher or lower during 2003. This showed that the superiority of the explanatory ability of EVA-based valuation model increased from 2003 to 2013 and showed that the EVAbased valuation model under changing required return better responded to recent data than to older data. It must be noted that the study considered the input data of the following 4 years i.e., up to 2017 to determine the intrinsic value in 2013. Therefore, the performance of the valuation model in other applications depends upon the timing of dataset in use. The more recent the data, the better the performance of the EVA-based valuation under a changing required return. However, more study is required to confirm this fact. EVA can be used to determine economic profit by subtracting the normal market earnings from company-specific earnings. Consistent with this idea, the formula of the EVA-based valuation model under changing required return indicates that the present value of EVAs determines EVA by subtracting the normal market value of equity from the market value of equity, where the normal market value of equity is the present value of normal market earnings. Thus, the present value of EVAs measures economic value added over the years, whereas EVA measures economic profit over a specific period. In the process, the suggested equation of the revised EVA-based valuation Behera Financial Innovation (2020) 6:9 Page 20 of 23 model under changing required return maintained consistency with the core objective of EVA. Moreover, the EVA-based valuation model can be implemented under the assumption of changing as well as a constant required return. The results of this study supported the findings of researchers such as Hodrock (1992); Keim and Stambaugh (1986); Saha and Malkiel (2012); Geltner and Mei (1995) that asset values are better explained by the time-varying discount rate than constant discount rate. This was true even though the studies were conducted on different valuation models. However, this study supported the statement that the model is not fixed and cannot be used in all circumstances; rather, a different model needs to be set to test various data under the proposed framework, (Chao et al. 2019). This study widened the application of the EVA-based valuation model. It can serve as a guide for investors and corporate managers in the process of selecting a valuation model and for academicians in pursuing further research. It also adds to and strengthens the existing body of literature on the EVA-based valuation model. Limitations and direction of future research For this study, the companies we selected comprised large-, mid-, and small-cap companies listed in the BSE 500. The number of companies was limited because they were selected on the basis of availability of complete data over the period from 2003 through 2017. The number of samples also varied over 2003, 2008, and 2013, as the study considered only the positive estimated market value of equities determined by the EVA valuation model under each of the assumptions. All the data were collected from Ace Equity, which was a secondary source. This study widened the application of the EVA-based valuation model under the changing required return and compared the efficiency of the revised valuation model under a changing required return with the existing EVA-based valuation model under a constant required return. The results indicated that the EVA-based valuation model under a changing required return performs better than the existing EVA-based valuation model under a constant required return and performs best with recent versus older sample data. The attempt to use the EVA-based valuation model under a changing required return, and the results of this study, opened up a new avenue for researchers to conduct further study. Supplementary information Supplementary information accompanies this paper at https://doi.org/10.1186/s40854-019-0167-8. Additional file 1: Table S1. (XLS 53 kb) Abbreviations BVE: Book value of equity; COV: Covariance; EMVE: Expected market value of equity; EVA: Economic value added; EVAUCRR: EVA under a constant required return; EVAUVRR: EVA under a varying required return; IVEUCRR: Intrinsic value of equity determined by EVA valuation model under a constant required return; IVEUVRR: Intrinsic value of equity determined by EVA valuation model under a varying required return; MVE: Market value of equity; NOPAT: Net operating profit after tax; PV EVAUVRR: Present value of EVAs under a varying required return; PVEVAUCRR: Present value of EVAs under a constant required return; PVNME: Present value of normal market earnings; PVNME: Present value of normal market earnings; r: Rate of return on equity; r e : Normal market rate of return or required rate of return; V: Variance Acknowledgments The author wishes to acknowledge Prof. Deepak Danak, Prof. M. Malikarjun, and Prof. Uday Paliwal at Nirma University Institute of Management for their critical suggestions. Behera Financial Innovation (2020) 6:9 Page 21 of 23 Authors’contributions Ms. Sujata Behera is the sole author of the manuscript. She has conceptualized the idea, conducted the study, and written the manuscript.The author read and approved the final manuscript. Author’s information Ms. Sujata Behera, Ph.D. Research Scholar, Institute of Management, Nirma University, S.G. Highway, Ahmedabad 382,424 Gujarat, India Funding No specific financial support was received to carry out the study. Availability of data and materials Data are available from the author on reasonable request. Competing interests The author declare that he or she has no competing interests. Received: 5 November 2018 Accepted: 15 December 2019 References Ahmed H (2015) Impact of Firms Earnings and Economic Value Added on the Market Share Value: An Empirical Study on the Islamic Banks in Bangladesh. 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