The authors explore the risk-return properties of simple momentum strategies in six major government-bond markets and find that trend-following investment rules generate positive information ratios in the 1987-2011 sample period. They simulate the combination of momentum portfolios with...

This paper analyzes how newly introduced transparency requirements for short positions affect investors' behavior and security prices. Employing a unique data set, which contains both public positions above and confidential positions below the regulatory disclosure threshold, we offer several...

Purpose This study delves into the nuanced implications of short-sale constraints on stock prices within the context of stock market efficiency. While existing research has explored this relationship, inconsistencies persist in their findings. The purpose of this study is to conduct a...

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...

This paper investigates the impact of Twitter attention, measured by abnormal number of tweets on stock trading activities. We find that Twitter attention has predictive power for future stock volatility and trading volume. A heightened number of tweets is followed by high volatility and trading...

Momentum is one of the largest and most pervasive market anomalies. However, despite a high mean and Sharpe ratio, momentum suffers from large negative skewness that comes from momentum crash periods. These crashes occur in times of both market stress and market rebound and thus variables that...

This paper examines the problem of information asymmetry between foreign, local, institutional and individual investors on the Bucharest Stock Exchange (BVB) for the period 2004-2011. Using monthly returns for individual companies listed on BVB, stock market indices during the seven years...

This paper examines how gambling-motivated trading affects aggregate financial market outcomes. Using a unique global gambling data set covering 39 countries, we show that the dollar volume of stock market gambling is at least 3.5 times the combined volume of “traditional” gambling outlets...

Stock prices occasionally move in response to unverified rumors. I propose a cheap talk model in which a rumormonger's incentives to tell the truth depend on the interaction between her investment horizon and the information acquisition decisions of message-receiving investors. The model's key...

We investigate the effect of investor overconfidence and margin trades on market efficiency around a market crash. We find that the price delay in a pre-crash period is about twice the price delay in a post-crash period. After a market crash, investors become more sensitive to market movements,...