Managing the retail format portfolio: An application of modern portfolio theory

We apply modern financial portfolio theory (MPT) to managing portfolios of retail formats. The objective of MPT is to maximize overall portfolio return for a given level of portfolio risk. We applied MPT to three prominent hotel firms to determine the ideal mix of formats in their hotel brand portfolios, using revenue per available room (RevPAR) as a proxy for return on investment. We found that all three firms could improve their returns and reduce their risk by reallocating the number of hotel rooms (i.e., scarce resources) across their different retail formats.     

Strategic orientation and firm risk

Entrepreneurial orientation (EO) and market orientation (MO) have received substantial conceptual and empirical attention in the marketing and management literature and both orientations have consistently been linked to stronger financial performance. Yet the way in which market-oriented firms seek to achieve superior rents is substantively different from that of entrepreneurially oriented firms which could lead to differential impacts of EO and MO on firm risk. In this study, the authors employ a text mining technique to assess firms' EO and MO and examine the impact of these two strategic orientations on shareholder risk outcomes. The results show that while EO increases idiosyncratic risk, MO decreases it. However, only EO decreases systematic risk. Overall, the results of this study demonstrate that a firm's decisions regarding strategic orientation should be examined in light of both likely risks and returns in order to make appropriate resource allocation decisions.     

Alliance portfolios and shareholder value in post-IPO firms: The moderating roles of portfolio structure and firm-level uncertainty

Using longitudinal data for initial public offering (IPO) firms, we examine the role played by structural differences between different types of alliance portfolios in the relationship between IPO firm alliance portfolios and shareholder returns. We show that because of the different signals they send to the capital market, different types of alliance portfolios affect IPO firm performance differently. Namely, financial markets seem to reward firms whose alliance portfolio is diversified across different types of alliances (a portfolio high in functional diversity), but not those who align their alliance partners into multiple functional points in the value chain (a portfolio high in vertical scope). We also examine the signaling role of alliance portfolios under different IPO firm uncertainty conditions. We note that uncertainty about the IPO firm is not limited to pre-IPO quality uncertainty. Investors also face transition uncertainty, post-IPO uncertainty about the ability of the firm to adapt to the new managerial challenges it faces and succeed post-IPO. We find that these two types of uncertainties moderate alliance portfolio effects in different ways. The beneficial effects of alliance portfolios in mitigating liabilities of newness is of greater importance for firms associated with higher quality uncertainty and for those associated with lower transition uncertainty.     

The role of Islamic asset classes in the diversified portfolios: Mean variance spanning test

This study investigates both conventional and Islamic investors' problems as to whether the inclusion of Islamic and conventional asset classes may expand the frontier of their respective portfolios. Our sample covers the global U.S. portfolios and Malaysian portfolios with multiple asset classes, as well as the portfolios with a specific asset class in several regions. This study uses the recent mean variance spanning test in multiple regimes, which not only accounts for tail risk but also identifies the source of value added (tangency portfolio or global minimum variance).For intra-asset allocation, our findings tend to show that both Islamic and conventional fund managers of a specific asset class can benefit from conventional and Islamic asset classes, respectively, in several regimes. For inter-asset allocation, conventional institutional investors cannot obtain any value added from Islamic asset classes. On the contrary, the U.S. Islamic institutional investors can expand their tangency portfolio by investing in U.S. TIPSs and REITs, and reduce their global minimum variance by allocating in U.S. high-yield bonds. Moreover, the Malaysian Islamic institutional investors can obtain risk reduction by investing in conventional bonds only in the high term premium regime. For the remaining asset classes, the opportunity sets are sufficient for Islamic investors to invest complying with Shariah rules. We provide some policy implications for the global Islamic financial industry.     

Choosing an optimal investment strategy: The role of robust pair-copulas based portfolios

This paper is concerned with the efficient allocation of a set of financial assets and its successful management. Efficient diversification of investments is achieved by inputing robust pair-copulas based estimates of the expected return and covariances in the mean-variance analysis of Markowitz. Although the whole point of diversifying a portfolio is to avoid rebalancing, very often one needs to rebalance to restore the portfolio to its original balance or target. But when and why to rebalance is a critical issue, and this paper investigates several managers' strategies to keep the allocations optimal. Findings for an emerging market target return and minimum risk investments are highly significant and convincing. Although the best strategy depends on the investor risk profile, it is empirically shown that the proposed robust portfolios always outperform the classical versions based on the sample estimates, yielding higher gains in the long run and requiring a smaller number of updates. We found that the pair-copulas based robust minimum risk portfolio monitored by a manager which checks its composition twice a year provides the best long run investment.     

基于风险预算的新疆居民家庭金融资产的风险资产配置

通过对新疆2013-2017年的居民家庭金融总资产以及投资和储蓄的分析,从宏观的家庭金融资产视角使用Markowitz的投资组合的均值-方差模型在风算预算的基础上,进一步计算出实际新疆居民每年应当用于储蓄或者用于投资与固定风险和较大风险的比例,即得出风险资产的配置,从而提高新疆居民的储蓄向投资的转化,加强居民金融资产的管理和风险资产的分配,提高居民的风险收益,为新疆居民家庭获取更多金融资产投资于风险性收入提供更好的政策建议。     

The complex firm financial effects of customer satisfaction improvements

It has been widely assumed that increases in customer satisfaction have continuous financial benefits for firms. However, recent meta-analysis results and anecdotal evidence suggest substantial variability in satisfaction-performance effects. We propose and investigate three explanations for this variability: (1) changing trade-offs of financial benefits vis-à-vis costs along the satisfaction continuum, (2) varying stickiness of benefits and costs over time, and (3) contextual effects related to a firm’s marketing strategic situation. For our empirical investigation, we used customer satisfaction scores and financial data for around 100 U.S. firms over a 15-year period. The results show that revenues and savings in marketing and acquisition costs can accelerate at high satisfaction levels. However, for many firms, operating costs and capital investments also accelerate, and shareholder returns for satisfaction improvements can become negative. Tests over different assessment horizons show that operating cost increases are sticky while top line benefits fade. Finally, firm strategy, offering customization, potential of customer word of mouth, and competitive innovation pressure determine the satisfaction payoffs. Our study will help managers to predict more accurately than before the financial effects of their customer-directed investment decisions.     

Driving Shareholder Value: The Role of Marketing in Reducing Vulnerability and Volatility of Cash Flows

Marketing professionals have historically found it difficultto measure and communicate to other disciplines and to top managementthe value created by marketing activities. All too often, justificationof marketing and communication initiatives is restricted to theirimpact on revenue generation. But, marketers do create valuein other ways. Marketing actions do lead to an acceleration ofthe market's acceptance of new products, to enhanced customerretention/loyalty, to an improvement in the size and qualityof customer bases, to price premiums and other desirable payoffs.Such financial outcomes suggest that marketing activities areoften strategic investments, not tactical, intangible expenses.We suggest that the effectiveness of marketinginitiatives should be evaluated on the basis of their impacton the basic drivers of shareholder value–cash flow acceleration,cash flow enhancement, reduction in volatility and vulnerabilityof cash flows, and growth in the long-term value of business).These shareholder value metrics provide a framework for communicationof the contribution of marketing strategies to value creation.In particular, this paper focuses on the role of marketing inenhancing shareholder value by reducing the vulnerability andvolatility (hence risks) associated with cash flows. This riskreduction (and shareholder value creation) role of marketingactivities is examined within cross-functional processes forcreating customer value such as design of new products and services,supply chain management and management of relationships withcustomers, channels and strategic partners.     

The conditional relationship between beta and returns: recent evidence from international stock markets

The risk–return relationship is one of the fundamental concepts in finance that is most important to investors and portfolio managers. Finance theory argues that the beta or systematic risk is the only relevant risk measure for investors. However, many studies have showed that betas and returns are not related empirically, no matter in domestic markets or in international stock markets. This paper examines the conditional relationship between beta and returns in international stock markets for the period from January 1991 to December 2000. After recognizing the fact that while expected returns are always positive, realized returns could be positive or negative, we find a significant positive relationship between beta and returns in up market periods (positive market excess returns) but a significant negative relationship in down market periods (negative market excess returns). The results are robust for both monthly and weekly returns and for two different proxies of the world market portfolio. Our findings indicate that beta is still a useful risk measure for portfolio managers in making optimal investment decisions.     

Why do foreigners invest in the United States?

Why are foreigners willing to invest over $2 trillion per year in the United States? This paper tests various hypotheses and finds that standard portfolio allocation models and diversification motives are poor predictors of foreign holdings of U.S. liabilities. Instead, foreigners hold greater shares of their investment portfolios in the United States if they have less developed financial markets. The magnitude of this effect decreases with income per capita. Countries that trade more with the United States also have greater portfolio shares in U.S. equity and bond markets. These results support recent theoretical work on the role of financial development in sustaining global imbalances and have important implications for whether the United States can continue to attract sufficient financing from abroad without major changes in asset prices and returns, especially in bond markets.     

Incorporating time-varying jump intensities in the mean-variance portfolio decisions

This paper examines the role of time-varying jump intensities in forming mean-variance portfolios. We find that compared with the no-jump or constant-jump models, the model which incorporates time-varying jump intensities better fits the dynamics of the assets returns, and yields mean-variance portfolios with higher Sharpe ratios. Our research suggests that using a better econometric model that captures non-normal features in the data has benefits for portfolio allocation even for a mean-variance investor.     

The interactive effects of product and brand portfolio strategies on brand performance: Longitudinal evidence from the U.S. automotive industry

Product and brand portfolio extensions are effective marketing strategies to meet customer needs and to create a competitive advantage in the marketplace. Nevertheless, product and brand portfolios can get out of control easily leading to a loss of market focus and market share. This study examines how product portfolio and branding decisions affect brand performance (unit sales and market share). Prior research in marketing has investigated the effects of product portfolio and branding strategies on firm performance in isolation. However, these decisions are rarely isolated events. Usually, for multi-product and multi-brand companies, product portfolio decisions are determined in conjunction with branding decisions. Using a dynamic panel generalized method of moments estimation on a comprehensive dataset from the U.S. automotive industry between 2007 and 2013, this study examines the extent to which product and brand portfolio characteristics interact to affect brand performance. Findings reveal that while brand portfolio scope augments the positive effects of portfolio depth and innovativeness on brand performance, it attenuates the positive effects of product portfolio breadth on brand performance. Also, brand positioning in auto industry enhances brand performance only when considered jointly with product portfolio breadth, depth, and innovativeness. Finally, the present study discovers critical managerial trade-offs between product and brand portfolio decisions, as product and brand portfolio decisions are intertwined and a careful examination of the existing product and brand portfolio characteristics seem to be warranted to maximize brand performance.     

Relationship between portfolio diversification and value at risk: Empirical evidence

This research explores the risk associated with the stocks prices in the seventeen selected companies that are listed in Indian BSE (100) National as well as portfolios of investment that are constructed from these seventeen companies employed. Additionally, for considering the possibility of international diversification, construction of portfolios of investment form stock price indexes in various emerging markets and developed countries of the world is considered. Correlations for domestically as well as internationally diversified portfolios are computed to unveil the relationship between stock prices of various firms as well as domestic and internationally diversified portfolios of investments. Further, to understand the effect of diversification on the risk associated with each of the portfolios of investments employed, value at risk analysis (VaR) is undertaken for studying the benefits associated with domestic as well as international diversification (if any).The study results show that domestic diversification lowers the expected losses associated with each of the domestic portfolios of investment employed where the international diversification substantially mitigates the portfolio risks. Results from VaR analysis reveal that diversification lowers the portfolio risks and additional reduction in portfolio risks is realized by international diversification.     

Portfolio Optimization and Martingale Measures

The paper studies connections between risk aversion and martingale measures in a discrete-time incomplete financial market. An investor is considered whose attitude toward risk is specified in terms of the index b of constant proportional risk aversion. Then dynamic portfolios are admissible if the terminal wealth is positive. It is assumed that the return (risk) processes are bounded. Sufficient (and nearly necessary) conditions are given for the existence of an optimal dynamic portfolio which chooses portfolios from the interior of the set of admissible portfolios. This property leads to an equivalent martingale measure defined through the optimal dynamic portfolio and the index 0 < b ≤ 1. Moreover, the option pricing formula of Davis is given by this martingale measure. In the case of b = 1; that is, in the case of the log-utility, the optimal dynamic portfolio defines the numéraire portfolio.     

Cross‐commodity analysis and applications to risk management

The understanding of joint asset return distributions is an important ingredient for managing risks of portfolios. Although this is a well‐discussed issue in fixed income and equity markets, it is a challenge for energy commodities. In this study we are concerned with describing the joint return distribution of energy‐related commodities futures, namely power, oil, gas, coal, and carbon. The objective of the study is threefold. First, we conduct a careful analysis of empirical returns and show how the class of multivariate generalized hyperbolic distributions performs in this context. Second, we present how risk measures can be computed for commodity portfolios based on generalized hyperbolic assumptions. And finally, we discuss the implications of our findings for risk management analyzing the exposure of power plants, which represent typical energy portfolios. Our main findings are that risk estimates based on a normal distribution in the context of energy commodities can be statistically improved using generalized hyperbolic distributions. Those distributions are flexible enough to incorporate many characteristics of commodity returns and yield more accurate risk estimates. Our analysis of the market suggests that carbon allowances can be a helpful tool for controlling the risk exposure of a typical energy portfolio representing a power plant. © 2009 Wiley Periodicals, Inc. Jrl Fut Mark 29:197–217, 2009     

Asymmetric Correlations in Predicting Portfolio Returns*

Rigorous statistical tests have been designed to detect the existence of asymmetric correlations. However, these tests can hardly further facilitate future investment or risk management because asymmetric correlations are time‐varying and difficult to predict. In this paper, we construct a unified state‐space model, which not only measures in‐sample asymmetric correlations, but also exploit out‐of‐sample asymmetric correlations in the context of predicting portfolio returns. First, we regard time‐varying correlation between market returns and portfolio returns as a state variable and model it as an AR(1) process. Then, we measure future asymmetric correlations based on correlation coefficients between two unpredictable components in market returns and correlation, respectively. Third, we clarify the intuition, calculate asymmetric correlations for two portfolio sets and estimate the economic value of applying our model in asset allocation. Finally, we try to search for potential variables that can explain future asymmetric correlations. The results show that market‐wide liquidity, variance, earning price ratio, and investor sentiment can partially explain the asymmetry correlation phenomenon.     

Selection of Socially Responsible Portfolios Using Hedonic Prices

This paper presents a novel framework for selecting socially responsible investment (SRI) portfolios. The Hedonic Price Method (HPM) is applied to obtain an evaluation of SRI criteria that is integrated into a multi-objective mathematical programming model. The HPM breaks away from the traditional view that goods are the direct object of utility; on the contrary, it assumes that utility is derived from the properties or characteristics of the goods themselves. As far as the investment decision is concerned, we assume that socially responsible investmentmutual funds (SRI funds) constitute heterogeneous goods. Our approach allows us to obtain a portfolio, the financial performance of which is similar to that which the investor would have reached if he or she had not taken into account social, ethical, and environmental considerations when making his or her investment decisions. This is achieved by designing a two-stage multi-objective mathematical programming procedure. In the first stage, we achieve the maximum level of financial satisfaction that the investor can receive. In the second stage, the portfolio with the best financial–social behavior is built. For the purpose of this second stage, the first stage portfolio is used as a benchmark for the financial performance of a socially responsible portfolio. To apply this methodology, we use portfolios composed of socially responsible and conventional mutual funds domiciled in Spain.     

When in peril, retrench: Testing the portfolio channel of contagion

The impact of past gains and losses on international investors' risk aversion is an important factor in the propagation of financial shocks across countries. We first present a stylized model illustrating how changes in investors' risk aversion affect portfolio decisions and stock prices. We then examine empirically the behavior of international mutual funds. When funds' returns are below average, they reduce their exposure to countries in which they were overweight and vice versa. An index of “financial interdependence” that reflects the extent to which countries share overexposed funds helps explain the pattern of stock market comovement across countries and the pattern of contagion during crises.     

Publicly traded venture capital funds: implications for institutional “fund of funds” investors

Institutional investors supply the bulk of the funds which are used by venture capital investment firms in financing emerging growth companies. These investors typically place their funds in a number of venture capital firms, thus achieving diversification across a range of investment philosophy, geography, management, industry, investment life cycle stage and type of security. Essentially, each institutional investor manages a “fund of funds,” attempting through the principles of portfolio theory to reduce the risk of participating in the venture capital business while retaining the up-side potential which was the original source of attraction to the business. Because most venture capital investment firms are privately held limited partnerships, it is very difficult to measure risk adjusted rates of return on these funds on a continuous basis.In this paper, we use the set of twelve publicly traded venture capital firms as a proxy to develop insight regarding the risk reduction effect of investment in a portfolio of venture capital funds, i.e., a fund of funds. Measurements of weekly total returns for the shares of these funds are compared with similar returns on a set of comparably sized “maximum capital gain” mutual funds and the daily return of the S&P 500 Index. A comparison of returns on an individual fund basis, as well as a correlation of daily returns of these individual funds, were made. In order to adjust for any systematic bias resulting from the “thin market” characteristic of the securities of the firms being observed, the Scholes-Williams beta estimation technique was used to reduce the effects of nonsynchronous trading.The results indicate that superior returns are realized on such portfolios when compared with portfolios of growth-oriented mutual funds and with the S&P 500 Index. This is the case whether the portfolios are equally weighted (i.e., “naive”) or constructed to be mean-variant efficient, ex ante, according to the capital asset pricing model. When compared individually, more of the venture funds dominated the S&P Market Index than did the mutual funds and by much larger margins. When combined in portfolios, the venture capital funds demonstrated very low beta coefficients and very low covariance of returns among portfolio components when compared with portfolios of mutual funds. To aid in interpreting these results, we analyzed the discounts and premia from net asset value on the funds involved and compared them to Thompson's findings regarding the contribution of such differences to abnormal returns. We found that observed excess returns greatly exceed the level which would be explained by these differences.The implications of these results for the practitioner are significant. They essentially tell us that, while investment in individual venture capital deals is considered to have high risk relative to potential return, combinations of deals (i.e., venture capital portfolios) were shown to produce superior risk adjusted returns in the market place. Further, these results show that further combining these portfolios into larger portfolios (i.e., “funds of funds”) provides even greater excess returns over the market index, thus plausibly explaining the “fund of funds” approach to venture capital investment taken by many institutional investors.While the funds studied are relatively small and are either small business investment companies or business development companies, they serve as a useful proxy for the organized venture capital industry, despite the fact that the bulk of the funds in the industry are institutionally funded, private, closely held limited partnerships which do not trade continuously in an open market. These results demonstrate to investors the magnitude of the differences in risk adjusted total return between publicly traded venture capital funds and growth oriented mutual funds on an individual fund basis. They also demonstrate to investors the power of the “fund of funds” approach to institutional involvement in the venture capital business. Because such an approach produces better risk adjusted investment results for the institutional investor, it seems to justify a greater flow of capital into the business from more risk averse institutional investment sources. This may mean greater access to institutional funds for those seeking to form new venture capital funds. For entrepreneurs seeking venture capital funds for their young companies, it may also mean a lower potential cost of capital for the financing of business venturing. From the viewpoint of public policy makers interested in facilitating the funding of business venturing, it may provide insight regarding regulatory issues surrounding taxation and the barriers and incentives which affect venture capital investment.     

Strategic Portfolio Management Model

Abstract

Institutional investors look forward to extra-ordinary returns in the new millennium. Yet, many have not displayed knowledge of scientific models such as modern portfolio theory, capital asset pricing model, and other financial assets investment management approaches, particularly within the local setting. They indiscriminately take risk by investing in subjectively determined options. We surveyed 44 quoted and unquoted companies, typical of emerging economies using Nigeria as a case. The test of hypotheses reveals that the firms' basis of portfolio selection is traditional. Investment risk is taken for granted. Also the homogeneity of portfolio components, though attractive in the short-run, adversely affect investment returns in the long-run. We, therefore, recommend the departmentalization and standardization of the corporate investment management process, reorientation and direction of organizational functionaries towards effective adoption of scientific approaches as integrally represented by the strategic portfolio management model, exemplified in this work.