Using newly-constructed data covering the last decade, we document that, in most of forty markets, when added to the main index, firms' returns experience an increase in comovement with the rest of the index, reflected in higher beta and greater explanatory power of the market return. Stock...

This short paper shows how excess global saving led to asset price inflation in U.S. stocks during 1981 to 2019. It compares stock PE ratios to corporate bond values to explain that investor exuberance for stocks enabled and enhanced the extent of the secular stock rise

We investigate the relation between downside beta and stock returns in a global context using more than 170 million daily return observations. Contrary to the findings in the U.S. equity market, we show that downside beta does not explain the cross-sectional differences in future and...

According to conventional wisdom, annualized volatility of stock returns is lower when computed over long horizons than over short horizons, due to mean reversion induced by return predictability. In contrast, we find that stocks are substantially more volatile over long horizons from an...