This paper examines unique data on dark pool activity for a large cross-section of US stocks in 2009. Dark pool activity is concentrated in liquid stocks. Nasdaq (AMEX) stocks have significantly higher (lower) dark pool activity than NYSE stocks controlling for liquidity. For a given stock, dark...

The complex and fragmented nature of the U.S. equities exchange landscape has given rise to structural inefficiencies that have created the potential for inherent conflicts of interest between market participants. The introduction of the Investors Exchange, or IEX, offers the unique opportunity...

We study the effect of X-Stream, the new trading platform of the Colombian Stock Exchange since February 2009, on the quality of the stock market. Contributing to the literature on market quality, this paper provides novel evidence of the effect of reforms on market design, trading rules and...

Cross-listing in the US opens a new information channel for cross-listed stocks and makes the cross-listed stocks more dependent on the US market as a source of information and intermarket competition for order flow. We test this proposition by examining the effects of closures of the NYSE on...

We use the 2016 U.S. SEC tick size pilot to examine the effects of an increase in the minimum price variation on limit order book liquidity in NASDAQ-listed stocks on the NASDAQ exchange. For treatment stocks with an average pre-pilot quoted spread less than $0.05, the tick size increase is...

The high-frequency market reaction to intraday stock-specific news flow is examined over the period January 2000 to November 2011. Data on novelty, relevance, and direction of company-specific news for the ASX50 leading Australian stocks is garnered from the Ravenpack news analytics tool....

We analyze how market fragmentation affects market quality of SME and other less actively traded stocks. Compared to large stocks, they are less likely to be traded on multiple venues and show, if at all, low levels of fragmentation. Concerning the impact of fragmentation on market quality, we...