We find predictable patterns in stock returns. Stocks whose relative returns are high in a given half-hour interval today exhibit similar outperformance in the same half-hour period on subsequent days. The effect is stronger at the beginning and end of the trading day. These results suggest that...

This paper distinguishes between a stock's liquidity (liquidity level), as measured by the average cost of trading it, and its liquidity beta (liquidity risk), as measured by the covariation of its return with unexpected changes in aggregate liquidity. Although considered safe assets in general,...

<heading id="h1" level="1" implicit="yes" format="display">ABSTRACT</heading>A principal-components analysis demonstrates that common earnings factors explain a substantial portion of firm-level earnings variation, implying earnings shocks have substantial systematic components and are not almost fully diversifiable as prior literature has concluded. Furthermore,...

This paper studies the effects of predictability on the earnings-returns relation for individual firms and for the aggregate. We demonstrate that prices better anticipate earnings growth at the aggregate level than at the firm level, which implies that random-walk models are inappropriate for...

We test whether momentum strategies remain profitable after considering market frictions induced by trading. Intraday data are used to estimate alternative measures of proportional and non-proportional (price impact) trading costs. The price impact models imply that abnormal returns to portfolio...

This paper highlights the different avenues through which stock liquidity can potentially transcend into accounting research. Recently, Lang and Maffett show that transparency reduces firm-level liquidity uncertainty, while Ng shows that increased information quality can reduce a firm's exposure...

This paper studies the effect of hedge-fund trading on idiosyncratic risk. We hypothesize that while hedge-fund activity would often reduce idiosyncratic risk, high initial levels of idiosyncratic risk might be further amplified due to fund loss limits. Panel-regression analyses provide...

This paper uncovers the changes in the cross-sectional distribution of idiosyncratic volatility of stocks over the period 1963--2008. The contribution of the top decile to the total market idiosyncratic volatility increased, while the contribution of the bottom decile decreased. We introduce a...

This paper studies seasonal predictability in the cross section of international stock returns. Stocks that outperform the domestic market in a particular month continue to outperform the domestic market in that same calendar month for up to 5 years. The pattern appears in Canada, Japan, and 12...