This paper examines how the implementation of a new dark order - Midpoint Extended Life Order on NASDAQ - impacts financial markets stability in terms of occurrences of mini-flash crashes in individual securities. We use high-frequency order book data and apply panel regression analysis to...

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...

Despite momentum's strong historical performance, its returns have large negative skewness and occasionally experiences persistent strings of sharp negative returns, referred as "momentum crashes" in the recent literature. I argue that momentum crashes are due to crowded trades which push prices...

On November 14th, 2014, SUERF – The European Money and Finance Forum – and CNMV, Comisión Nacional del Mercado de Valores – the Spanish Authority for supervision of securities markets – jointly organized a conference in Madrid: Challenges in Securities Markets Regulation: Investor...

We examine how the implementation of a new dark order type - Midpoint Extended Life Order (M-ELO) on NASDAQ - impacts financial markets stability in terms of occurrences of mini-flash crashes in individual securities. We use high-frequency order book data around the implementation date and apply...

Short sellers are routinely blamed for destabilizing stock markets by exacerbating deviations from fundamental values. In response, regulators periodically impose short sale constraints aimed at preventing excessive stock market declines. One explanation is that policy makers regard short...

Momentum strategies suffer from occasional large drawdowns referred to as momentum crashes when the market rebounds. This paper documents that stocks far from peaks outperform stocks near peaks, and momentum crashes are attributable to such outperformance. Market rebounds triggers increase in...

We show that (electronic) designated market makers are not necessarily beneficial to the stock market during ash crashes. They actually consume liquidity when it is most needed, even if they are rewarded by the exchange to provide immediacy. This behavior exacerbates the transient price impact,...

This paper investigates the effect of investor protection on the value impact of stock liquidity. Using a sample of rms from 40 countries for the period between 1996 and 2010, we show that investor protection is positively associated with the value impact of stock liquidity. This association is...