This paper examines the use, determinants and impact of anonymous orders in a market where disclosure of broker identity in the trading screen is voluntary. We find that most trading occurs non-anonymously, contrary to prior literature that suggests liquidity gravitates to anonymous markets. By...

We examine returns, order flow, and market conditions in the minutes before, during, and after NYSE and Nasdaq short sales. We find two distinct types of short sales: those that provide liquidity, and those that demand it. Liquidity-supplying shorts are strongly contrarian at intraday horizons....

We empirically analyze the prevalence and economic underpinnings of closing price manipulation and its detection. We estimate that approximately one percent of closing prices are manipulated, of which only a small fraction is detected and prosecuted. We find that stocks with high levels of...

Regulators globally are concerned that dark trading harms price discovery. We show that dark trades are less informed than lit trades. High levels of dark trading increase adverse selection risk on the lit exchange by increasing the concentration of informed traders. Using both high- and...

We study the effects of closing price manipulation in an experimental market to evaluate the social harm caused by manipulation. We find that manipulators, given incentives similar to many actual manipulation cases, decrease price accuracy and liquidity. The mere possibility of manipulation...

We quantify the effects of closing price manipulation on trading characteristics and stock price accuracy using a unique sample of prosecuted manipulation cases. Based on these findings we construct an index of the probability and intensity of closing price manipulation. As well as having...