Successfully Exploiting the ex-Dividend Effect?
April 3, 2014 - Fundamental Valuation
Can the best traders reliably exploit the ex-dividend effect (the tendency for dividend-paying stocks to fall by less than the dividend amount after paying the dividend)? In their March 2014 paper entitled “Ex-Dividend Profitability and Institutional Trading Skill”, Tyler Henry and Jennifer Koski examine whether highly skilled traders bearing very low transaction costs (some institutions) successfully exploit this effect. They use actual transaction prices and actual transaction costs. They segment their sample period into three regimes: Regime 1 is pre-decimalization and pre-tax reform that equalizes capital gains and dividend tax rates; Regime 2 is post-decimalization and pre-tax reform; and, Regime 3 is post-decimalization and post-tax reform. They specify the ex-dividend trading window as days -5 through +5 relative to ex-dividend day 0. Using a large proprietary set of institutional common stock buy and sell transactions and associated transaction costs, and contemporaneous dividends, returns, bid/ask prices and trading volumes for those stocks, during 1999 through 2007 (24,741 ex-dividend events for 1,351 firms), they find that: Keep Reading