We develop a return variance decomposition model to separate the role of different types of information and noise in stock price movements. We disentangle four components: market-wide information, private firm-specific information revealed through trading, firm-specific information revealed...

To maximize firm value managers must efficiently invest new capital. This paper examines whether analyst coverage impacts a firm's investment efficiency. Using broker mergers and closures as exogenous shocks to the number of analysts covering a firm we find that firm investment efficiency...

Exchange traded funds (ETFs) that track a specified index are a financial technology that has risen dramatically in the last two decades. We model an ETF's optimal index replication strategy and show that it involves underweighting or omitting illiquid index assets. Instrumenting for ETF trading...