We document a striking change in index return serial dependence across 20 major market indexes covering 15 countries in North America, Europe, and Asia. While many studies found serial dependence to be positive until the 1990s, it switches to negative since the 2000s. This change happens in most...

Coval and Moskowitz (1999) report that proximity influences investment. We extend the measurement of proximity beyond distance and report that air travel reduces local investment bias. This result is confi rmed using the initiation of connecting flights through recently opened air hubs since...

Fractional trading (FT)—the ability to trade less than a full share—allows low-budget retail investors to trade high-priced stocks. This paper quantifies FT's impact on retail ownership and trading of high-priced stocks by exploiting its sequential introduction at four brokerage firms since...

Recent financialization in commodity markets makes it easier for institutional investors to trade a portfolio of commodities via various commodity-indexed products. We present novel causal evidence that exposure to such index trading results in negative daily return autocorrelations among...