Richard Roll | |
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| Born | October 31, 1939 |
| Nationality | American |
| Academic career | |
| Field | Financial economics |
| School or tradition | Chicago School |
| Influences | Merton Miller |
| Information at IDEAS / RePEc | |
Richard Roll (born October 31, 1939) is an American economist and professor of finance at CalTech, best known for his work on portfolio theory and asset pricing, both theoretical and empirical.
He earned his bachelor's degree in aerospace engineering from Auburn University in 1961, and his M.B.A. in 1963 at the University of Washington while working for Boeing in Seattle, Washington. In 1968, he received his Ph.D. from the Graduate School of Business at the University of Chicago in economics, finance, and statistics. His Ph.D. thesis, "The Behavior of Interest Rates: An Application of the Efficient Market Model to U.S. Treasury Bills," won the Irving Fisher Prize as the best American dissertation in economics in 1968.
Roll co-authored the first event study that sought to analyze how stock prices respond to an event in 1969, [1] using price data from the newly available CRSP database. Roll has co-authored major papers with Stephen Ross, [2] [3] [4] Eugene Fama, [1] [5] [6] Michael Jensen [1] and Kenneth French. [7]
Roll took an Assistant Professor position at Carnegie-Mellon University in 1968, a professorship at the European Institute for Advance Studies in Management in 1973, and Centre d'Enseignement Superiéure des Affaires in 1975. In 1976, Roll joined the faculty at UCLA, from which he retired as Japan Alumni Chair Professor of Finance in 2014. In 1987, Roll was elected president of the American Finance Association. Roll has published over 80 professional articles.[ citation needed ] [8]
Financial economics is the branch of economics characterized by a "concentration on monetary activities", in which "money of one type or another is likely to appear on both sides of a trade". Its concern is thus the interrelation of financial variables, such as share prices, interest rates and exchange rates, as opposed to those concerning the real economy. It has two main areas of focus: asset pricing and corporate finance; the first being the perspective of providers of capital, i.e. investors, and the second of users of capital. It thus provides the theoretical underpinning for much of finance.
Myron Samuel Scholes is a Canadian–American financial economist. Scholes is the Frank E. Buck Professor of Finance, Emeritus, at the Stanford Graduate School of Business, Nobel Laureate in Economic Sciences, and co-originator of the Black–Scholes options pricing model. Scholes is currently the chairman of the Board of Economic Advisers of Stamos Capital Partners. Previously he served as the chairman of Platinum Grove Asset Management and on the Dimensional Fund Advisors board of directors, American Century Mutual Fund board of directors and the Cutwater Advisory Board. He was a principal and limited partner at Long-Term Capital Management (LTCM), a highly leveraged hedge fund that collapsed in 1998, and a managing director at Salomon Brothers. Other positions Scholes held include the Edward Eagle Brown Professor of Finance at the University of Chicago, senior research fellow at the Hoover Institution, director of the Center for Research in Security Prices, and professor of finance at MIT's Sloan School of Management. Scholes earned his PhD at the University of Chicago.
In finance, the capital asset pricing model (CAPM) is a model used to determine a theoretically appropriate required rate of return of an asset, to make decisions about adding assets to a well-diversified portfolio.
The efficient-market hypothesis (EMH) is a hypothesis in financial economics that states that asset prices reflect all available information. A direct implication is that it is impossible to "beat the market" consistently on a risk-adjusted basis since market prices should only react to new information.
Eugene Francis "Gene" Fama is an American economist, best known for his empirical work on portfolio theory, asset pricing, and the efficient-market hypothesis.
In finance, arbitrage pricing theory (APT) is a multi-factor model for asset pricing which relates various macro-economic (systematic) risk variables to the pricing of financial assets. Proposed by economist Stephen Ross in 1976, it is widely believed to be an improved alternative to its predecessor, the capital asset pricing model (CAPM). APT is founded upon the law of one price, which suggests that within an equilibrium market, rational investors will implement arbitrage such that the equilibrium price is eventually realised. As such, APT argues that when opportunities for arbitrage are exhausted in a given period, then the expected return of an asset is a linear function of various factors or theoretical market indices, where sensitivities of each factor is represented by a factor-specific beta coefficient or factor loading. Consequently, it provides traders with an indication of ‘true’ asset value and enables exploitation of market discrepancies via arbitrage. The linear factor model structure of the APT is used as the basis for evaluating asset allocation, the performance of managed funds as well as the calculation of cost of capital. Furthermore, the newer APT model is more dynamic being utilised in more theoretical application than the preceding CAPM model. A 1986 article written by Gregory Connor and Robert Korajczyk, utilised the APT framework and applied it to portfolio performance measurement suggesting that the Jensen coefficient is an acceptable measurement of portfolio performance.
Harold Hotelling was an American mathematical statistician and an influential economic theorist, known for Hotelling's law, Hotelling's lemma, and Hotelling's rule in economics, as well as Hotelling's T-squared distribution in statistics. He also developed and named the principal component analysis method widely used in finance, statistics and computer science.
John Brian Taylor is the Mary and Robert Raymond Professor of Economics at Stanford University, and the George P. Shultz Senior Fellow in Economics at Stanford University's Hoover Institution.
A market anomaly in a financial market is predictability that seems to be inconsistent with theories of asset prices. Standard theories include the capital asset pricing model and the Fama-French Three Factor Model, but a lack of agreement among academics about the proper theory leads many to refer to anomalies without a reference to a benchmark theory. Indeed, many academics simply refer to anomalies as "return predictors", avoiding the problem of defining a benchmark theory.
The random walk hypothesis is a financial theory stating that stock market prices evolve according to a random walk and thus cannot be predicted.
Kenneth Ronald "Ken" French is the Roth Family Distinguished Professor of Finance at the Tuck School of Business, Dartmouth College. He has previously been a faculty member at MIT, the Yale School of Management, and the University of Chicago Booth School of Business.
Michael Cole Jensen was an American economist who worked in the field of financial economics. From 1967-1988, he was on the University of Rochester's faculty. Between 2000 and 2009 he worked for the Monitor Company Group, a strategy-consulting firm which became "Monitor Deloitte" in 2013. Until 2000, he held the position of Jesse Isidor Straus Professor of Business Administration at Harvard University.
Robert F. Stambaugh is an American economist, who specializes in econometrics and finance.
In asset pricing and portfolio management the Fama–French three-factor model is a statistical model designed in 1992 by Eugene Fama and Kenneth French to describe stock returns. Fama and French were colleagues at the University of Chicago Booth School of Business, where Fama still works. In 2013, Fama shared the Nobel Memorial Prize in Economic Sciences for his empirical analysis of asset prices. The three factors are (1) market excess return, (2) the outperformance of small versus big companies, and (3) the outperformance of high book/market versus low book/market companies. There is academic debate about the last two factors.
Raymond J. (Ray) Ball is a researcher and educator in accounting and financial economics. He is the Sidney Davidson Distinguished Service Professor of Accounting in the University of Chicago’s Booth School of Business. He has published foundational research on the economics of financial reporting and financial markets.
Kenneth David West is the John D. MacArthur and Ragnar Frisch Professor of Economics in the Department of Economics at the University of Wisconsin. He is currently co-editor of the Journal of Money, Credit and Banking, and has previously served as co-editor of the American Economic Review. He has published widely in the fields of macroeconomics, finance, international economics and econometrics. Among his honors are the John M. Stauffer National Fellowship in Public Policy at the Hoover Institution, Alfred P. Sloan Research Fellowship, Fellow of the Econometric Society, and Abe Fellowship. He has been a research associate at the NBER since 1985.
Campbell Russell "Cam" Harvey is a Canadian economist, known for his work on asset allocation with changing risk and risk premiums and the problem of separating luck from skill in investment management. He is currently the J. Paul Sticht Professor of International Business at Duke University's Fuqua School of Business in Durham, North Carolina, as well as a research associate with the National Bureau of Economic Research in Cambridge, Massachusetts. He is also a research associate with the Institute of International Integration Studies at Trinity College Dublin and a visiting researcher at the University of Oxford. He served as the 2016 president of the American Finance Association.
In investing and finance, the low-volatility anomaly is the observation that low-volatility securities have higher returns than high-volatility securities in most markets studied. This is an example of a stock market anomaly since it contradicts the central prediction of many financial theories that higher returns can only be achieved by taking more risk.
The joint hypothesis problem is the problem that testing for market efficiency is difficult, or even impossible. Any attempts to test for market (in)efficiency must involve asset pricing models so that there are expected returns to compare to real returns. It is not possible to measure 'abnormal' returns without expected returns predicted by pricing models. Therefore, anomalous market returns may reflect market inefficiency, an inaccurate asset pricing model or both.
Factor investing is an investment approach that involves targeting quantifiable firm characteristics or “factors” that can explain differences in stock returns. Security characteristics that may be included in a factor-based approach include size, low-volatility, value, momentum, asset growth, profitability, leverage, term and carry.
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