This paper studies the effect of new fund flows on investment behavior and the resulting equilibrium price of risk. The Small Fund Industry model shows equilibria with overinvestment in unprofitable and underinvestment in profitable investment opportunities. The Large Fund Industry model derives...

Market efficiency varies across individual stock according to stock attributes. This paper finds prices are closer to random walk benchmarks for stocks with better liquidity provision, frequent trading, greater return volatility, higher prices, larger market capitalizations, and smaller trade...

This paper proposes the first tractable rational expectation equilibrium model that includes both endogenous price and endogenous execution probability. I use the model to examine the market outcome when the informed trader can split trades between an exchange and a crossing network (dark pool)...

This paper examines how individual investors' participation in short sale affects the efficiency of stock pricing using a unique regulatory change in Korea. The change enables individual investors to sell short some -- but not all -- domestic stocks, without affecting the short-selling ability...

Algorithms enable investors to locate trading opportunities, which raises gains from trade. Algorithmic traders can also process information on stock values before slow traders, which generates adverse selection. We model trading in this context and show that, for a given level of algorithmic...

We study how high-frequency traders (HFTs) strategically decide their speed level in a market with a random speed bump. If HFTs recognize the market impact of their speed decision, they perceive a wider bid-ask spread as an endogenous upward-sloping cost of being faster. We find that the speed...

We study how high-frequency traders (HFTs) strategically decide their speed level in a market with a random speed bump. If HFTs recognize the market impact of their speed decision, they perceive a wider bid-ask spread as an endogenous upward-sloping cost of being faster. We find that the speed...

I argue that arbitrage mistranslates factor information from ETFs to constituent securities and distorts comovement. The intuition behind this distortion is arbitrageurs trade constituent securities not based on their fundamental exposures but by their portfolio weights, causing securities to...

Trust companies generate leverage cycle dynamics by intermediating less regulated credit to the financial markets in China. We find that the leverage factor constructed from trust companies can explain the time-series and cross-sectional asset returns. The leverage factor derived from securities...