High-frequency activity on NASDAQ / Martin Scholtus and Dick van Dijk -- The profitability of high-frequency trading : is it for real? / Imad Moosa and Vikash Ramiah -- Data characteristics for high-frequency trading systems / Bruce Vanstone and Tobias Hahn -- The relevance of heteroskedasticity...

High-frequency trading (HFT) has recently drawn massive public attention fuelled by the U.S. May 6, 2010 flash crash and the tremendous increases in trading volumes of HFT strategies. Indisputably, HFT is an important factor in markets that are driven by sophisticated technology on all layers of...

Radical fluctuations in stock prices result from interactions within a complex self-organizing system of economic agents. Since the financial crisis of 2008, there has been an increased reliance on financial modeling and algorithmic trading in equity portfolio management. Under pressure to...

In this paper we present a simple closed form stock price formula, which captures empirical regularities of high frequency trading (HFT), based on two factors: (1) exposure to hedge factor; and (2) hedge factor volatility. Thus, the parsimonious formula is not based on fundamental valuation. For...

We document that Algorithmic Traders (ATs) reduce analysts' stock coverage and the number of analyst research reports. This evidence reflects that ATs pre-empt trades on new information, which reduces non-AT investment-driven demand for analyst research. Consistently, the effects we document...

For the highly traded S&P 500 exchange traded fund SPY, we find that, over time, transaction size has been decreasing while the number of consecutive buy or sell transactions has been increasing due to the increased prevalence of high frequency trading and order splitting. Collapsing sequences...

High-frequency traders in financial markets have been making media headlines. As a relatively new phenomenon, much of the discussion is not backed by solid academic research. In this special issue of the Journal of Financial Markets on High-Frequency Trading, we present several research papers...