This hub spans two tightly linked literatures. Optimal execution — how to trade a large order while balancing market impact against timing risk — is a stochastic-control problem with a celebrated closed-form lineage from Almgren-Chriss onward, and it remains one of the most directly implementable areas of quant research. High-frequency trading research studies the strategies, profitability, and market effects of trading at millisecond horizons.

For execution papers, the gap to watch is between model and market: elegant impact models assume permanent/temporary impact splits that are hard to estimate from data you can actually get. Papers scoring high on rigor calibrate against real parent-order data or realistic simulators rather than assuming parameters. For HFT studies, dataset provenance is everything — results from proprietary exchange data with participant identifiers say far more than inferences from public trades-and-quotes feeds.

Related hubs: Market Microstructure, Reinforcement Learning, Statistical Arbitrage.

Explainers from the corpus: VWAP prediction: methods and benchmarks →