Big Ideas

Can investors systematically benefit from the perspective that trading is the exchange of one asset for another, not the buying and selling of a single asset? In his paper entitled “Optimal Rotational Strategies Using Combined Technical and Fundamental Analysis”, third-place winner for the 2011 Wagner Award presented by the National Association of Active Investment Managers, Tony Cooper presents methods and tools designed to exploit the precept that valuations are relative. An organizing concept for these methods and tools is the Binary Decision Chart (BDC), which in one form addresses simultaneous analysis of two competing investments for the purpose of switching or weighting and in an extended form addresses combining technical analysis (based on observed price action) and fundamental analysis (indicator-based prediction). BDCs are cumulative return charts, but the horizontal axis may be a technical or fundamental indicator rather than time. More specifically, using various asset price series and indicators, he illustrates the following methods/tools: Keep Reading

Trading rules that generate clustered signals present capital allocation problems. Sometimes unpredictable scarcity of signals idles capital, and other times unpredictable clustering of signals presents too many opportunities to exploit. Portfolio-level performance therefore falls considerably short of trade-level promise. Are there ways to optimize capital allocation for such trading rules? In his paper entitled “Buying Power – The Overlooked Success Factor”, winner of the 2011 Wagner Award presented by the National Association of Active Investment Managers, Thomas Krawinkel examines the interplay of capital constraints and clustered trading signals. Using example trading rules for illustration, he concludes that: Keep Reading

In his 2011 book Super Boom: Why the Dow Will Hit 38,820 and How You Can Profit from It, author Jeffrey Hirsch (editor-in-chief of the Stock Trader’s Almanac) states, regarding the book’s title and a target date of 2025: “…I believe it will happen” and more cautiously “the coming super boom is not only plausible, but mathematically and historically probable. Moves of this magnitude have happened several times throughout history, and they have always been preceded by tumultuous times and economic weakness. In fact, big moves happen with such regularity and clear cause that we have successfully identified why they happen, how they happen, and when they happen. Most importantly, we show what to invest in before and as they happen.” Derived from approximately a century of historical observations, some notable points from the book are: Keep Reading

Can portfolios exhibit properties not evident from, or even contrary to, average properties of their component assets? In the April 2011 draft of their paper entitled “The Sources of Portfolio Returns: Underlying Stock Returns and the Excess Growth Rate”, Jason Greene and David Rakowski provide a framework for distinguishing two sources of portfolio return: (1) weighted average growth rates of component assets; and, (2) portfolio “excess growth rate” derived from diversification (component return volatilities and correlations). They apply this framework to investigate equity portfolio equal-weighting versus value-weighting, and to isolate the sources of the size effect and the value premium. They establish consistency in return measurements by matching rebalancing frequency and return measurement interval. Using monthly returns and firm characteristics for a broad sample of U.S. stocks over the period 1960 through 2009, they find that: Keep Reading

In their March 2011 paper entitled “The Shrinking Space for Anomalies”, George Jiang and Andrew Zhang investigate the robustness of ten well-known anomalies by iteratively “shrinking the stock space” in two ways to determine whether and how the anomalies really work. The ten anomaly variables are: size, book-to-market ratio, momentum, two liquidity measures, idiosyncratic volatility, accrual, capital expenditure, sales growth and net share issuance. The first way of “shrinking the stock space” involves: (1) ranking the universe of stocks by each of the ten anomaly variables into deciles; (2) iteratively trimming deciles from side of a variable distribution that a hedge portfolio would sell and the side that a hedge portfolio would buy; and, (3) retesting the strength of the anomaly associated with the variable after each iterative trimming. The second way of “shrinking the stock space” involves: (1) trimming from the sample stocks with the smallest market capitalizations and the most extreme book-to-market ratios until size, book-to-market and momentum no longer have significant four-factor alphas for value-weighting and equal equal-weighting (thereby “perfecting” the sample for the four-factor model); and, (2) retesting the strength of the anomalies associated with the other seven variables using the perfected sample. This approach obviates weaknesses in alpha measurement via the commonly applied but imperfect three-factor (market, size, book-to-market) and four-factor (plus momentum) risk models. Using firm characteristics and trading data for all non-financial NYSE, AMEX, and NASDAQ common stocks over the period July 1962 through December 2007, they find that: Keep Reading

What is a financial market anomaly? How can investors determine whether an apparent anomaly is real (economically material)? In his March 2011 book chapter entitled “Perspectives on Capital Market Anomalies”, Mozaffar Khan provides a framework for interpreting academic research on anomalies and evaluating the exploitability of specific anomalies. His context is market efficiency: “Respect for the efficient markets theory, and an acknowledgment that it sometimes fails (i.e., that mispriced stocks can be identified), can coexist.” Key points are: Keep Reading

Can Treasury Inflation-Protected Securities (TIPS), with principal indexed to the U.S. non-seasonally adjusted Consumer Price Index for all urban consumers (CPI), play a valuable role in asset class diversification? In the January 2011 draft of their paper entitled “Optimal Portfolio Choice in Real Terms: Measuring the Benefits of TIPS”, Alvaro Cartea, Jonatan Saul and Juan Toro apply mean-variance optimization to measure the empirical diversification benefits of TIPS for long-term and short-term investors with portfolios including various combinations of equities, nominal Treasuries, commodities and real estate. Using nominal monthly returns for all TIPS issued before August 2009, grouped by maturity, for the period March 1997 through March 2010 (157 monthly observations) and contemporaneous returns for nominal U.S. Treasury instruments, U.S. stocks, commodities and U.S. home prices, they find that: Keep Reading

In his 2010 book Wave Theory for Alternative Investments: Riding the Wave with Hedge Funds, Commodities, and Venture Capital, author Stephen Todd Walker asserts that “dynamic asset allocation (as opposed to static allocation) is imperative… In my view, now is the time that one should be adding alternatives to a well-diversified portfolio. It is time to get out the surfboard. I believe alternatives move in waves, and this next wave will be worth riding. …Investors should consider all asset classes, especially those they do not fully understand, because that is where an investor will likely find the best opportunity going forward. …No one possesses a crystal ball, but it is not impossible to identify a certain trend or wave forming with alternatives.” The book first introduces the author’s Wave Theory of asset class performance and then examines some alternative asset classes. Some notable points from the book regarding dynamic asset class allocation are: Keep Reading

Is there a window of exploitation before prices of individual stocks incorporate relevant information shocks? If so, what is its duration? In their January 2011 paper entitled “Speed of Convergence to Market Efficiency: The Role of ECNs”, Dennis Chung and Karel Hrazdil investigate the duration of stock price inefficiency based on the time interval over which order imbalances significantly predict short-term returns. They focus on the effect of electronic networks on this duration. Using high-frequency stock trade and quote data, institutional ownership levels and market capitalizations for 2,041 firms with shares trading contemporaneously on NYSE and an electronic network (Arca) during the first six months of 2008, they find that: Keep Reading

In his 2011 book The Power of Passive Investing: More Wealth with Less Work, author Richard Ferri presents “the detailed studies and undeniable evidence favoring a passive investing approach. …This information clearly shows that trying to beat the market has never been a reliable investment strategy in the past, and there’s no reason to believe it will beat a passive approach in the future. …Attempting to earn above market returns by picking actively managed mutual funds is an inefficient use of time and money. Knowing this fact, and acknowledging it allows you the freedom to go in a different direction–to change religion in a sense. …This book makes the case for passive investing. You’ll have to read other books for details on asset allocation recommendations and fund selection methods.” The book includes 140 citations of formal studies and expert commentaries. Some notable points from the book are: Keep Reading