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Momentum Investing

Do financial market prices reliably exhibit momentum? If so, why, and how can traders best exploit it? These blog entries relate to momentum investing/trading.

Buying on Impulse (Change in Momentum)

In their September 2005 paper entitled “Acceleration Strategies”, Eric Gettleman and Joseph Marks examine the change in six-month stock price momentum (a second derivative of price with respect to time, which the authors call “acceleration”) for individual companies as a potential indicator of future performance. Does increasing (decreasing) stock price momentum indicate commensurate relative outperformance (underperformance)? Based on monthly data spanning 1926-2003, they conclude that: Keep Reading

The Disposition Effect as a Driver of Momentum

In the February 2005 update to his paper entitled “The Disposition Effect and Under-reaction to News”, Andrea Frazzini tests whether the “disposition effect” (the tendency of investors to sell stocks that have gone up, not down, in value since purchase) causes stock prices to under-react to bad news when most current holders face a capital loss and under-react to good news when most current holders face a capital gain. Using a database of the holdings of a large class of investors (mutual funds) to estimate reference prices for individual stocks, he ranks stocks according to unrealized capital gains/losses and correlates this ranking with response to corporate news and subsequent return. Based on data spanning 1980-2002, he finds that: Keep Reading

Momentum Investing: Surfing Waves in the Economy?

In their June 2005 paper entitled “Momentum Profits and Macroeconomic Risk”, Laura Liu, Jerold Warner and Lu Zhang examine the connection between momentum returns and the overall economy, using the growth rate of industrial production as a proxy for the economic trend. They use monthly data for a large selection of common stocks listed on the NYSE, AMEX, and NASDAQ from January 1960 to December 2001 to construct ten equally weighted momentum portfolios, ranking on past six-month returns and holding for six subsequent months. They find that: Keep Reading

Why Momentum Investing Works?

In their July 2005 paper entitled “Momentum Profits and Non-Normality Risks”, Ana-Maria Fuertes, Joelle Miffre and Wooi Hou Tan examine the distributions of returns for nine momentum investing strategies as they attempt to explain why the resultant portfolios outperform. These nine strategies consist of overlapping portfolios formed monthly that are long (short) the equally weighted tenth of stocks with the highest (lowest) return over the past 3, 6 or 12 months and held for the next 3, 6 or 12 months. Using monthly data for all NYSE, AMEX and NASDAQ stocks priced over $5 during February 1973 through August 2004, they find that: Keep Reading

Going with the Flows

In their May 2005 paper entitled “Asset Fire Sales (and Purchases) in Equity Markets”, Joshua Coval and Erik Stafford examine the effects on stock prices of mutual funds forced to sell (buy) because of predictable outflows (inflows) of funds based on their past performance. Does such forced selling and buying present predictable opportunities for front-running? By studying mutual fund transactions caused by capital flows from 1980 to 2003, they conclude that: Keep Reading

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