Recent evidence indicates that momentum profits are sensitive to market conditions. We find that the profits are higher when the markets continue in the same state than when they transition to a different state. These findings support Daniel, Hirshleifer, and Subrahmanyam (1998), who suggest...

We examine the importance of indexing, industry, and broad market forces in driving common effects in order flow, returns, and trading costs. Common effects are strong for order flow and returns in a sample of S&P 500 stocks, but are weak in a sample of non-index stocks and for trading costs in...