A re-entry theory for abnormal behavior of financial markets in January is derived and tested. The model predicts that, by optimally shifting portfolios to mimic a benchmark, successful investment managers lock in superior performance, while unsuccessful investment managers lock out possible...

This paper tests a theoretical model of the basis and open interest of stock index futures. The model is based on the differences between stock and futures in terms of investors' ability to customize stock portfolios and liquidity. Empirical evidence confirms the model's prediction that...

We analyze Berkshire Hathaway's equity portfolio over the 1976 to 2006 period and explore potential explanations for its superior performance. Contrary to popular belief, we find Berkshire Hathaway invests primarily in large-cap growth rather than quot;valuequot; stocks. Over the period the...