We investigate how and why relative tick sizes influence traders' order strategies, and how this affects liquidity provision in the market. Using unique NYSE data, we find that a larger relative tick size benefits HFT market makers: they leave orders in the book longer, trade more aggressively,...

Andersen and Bondarenko's paper “VPIN and the Flash Crash” is essentially a comment on our 2011 Journal of Portfolio Management paper using our measure of order toxicity, VPIN. Andersen and Bondarenko dispute our empirical findings and argue that VPIN essentially does not work. This is...

Equity markets world-wide have seen a proliferation of trading venues and the consequent fragmentation of order flow. In this paper, we examine how fragmentation of trading is affecting the quality of trading in U.S. markets. We propose using newly-available TRF (trade reporting facilities)...

This paper reviews and analyzes the legal and economic aspects of the duty of best execution. Although a well-established principle of securities trading, we show that the dual problems of definition and enforcement make best execution both unwieldy and unworkable as a mandated legal duty. We...

Recently exchanges have been directly selling market data. We analyze how this practice affects price discovery, the cost of capital, return volatility, and market liquidity. We show that selling price data increases the cost of capital and volatility, worsens market efficiency and liquidity,...

This paper investigates execution quality issues in corporate bond trading. Using an extensive sample of bond trades by insurance companies, we find that an insurance company entering a trade of similar size and on the same side for the same bond on the same day with the same dealer will receive...