Direct Market Access
Technology that lets traders place orders directly on an exchange order book, bypassing a broker's desk.
What is DMA?
Direct market access (DMA) is a service offered by broker-dealers that allows institutional clients to electronically place orders directly onto an exchange's order book — bypassing the broker's trading desk and receiving market-level execution. DMA provides traders with greater speed, transparency, and control over order placement, as orders reach the exchange's matching engine directly rather than being filtered through a human intermediary. It is widely used by hedge funds, asset managers, and proprietary trading firms executing algorithmic strategies where milliseconds of execution latency matter. DMA is a prerequisite for most systematic trading and is a key component of the market structure underlying modern equity markets.
Example
A quantitative hedge fund executing a statistical arbitrage strategy between two correlated stocks uses DMA to submit limit orders directly to NYSE Arca's order book with sub-millisecond precision. Without DMA, routing through a human broker's desk would introduce hundreds of milliseconds of latency — enough for prices to move against the trade and eliminate the strategy's thin alpha.
Source: SEC — Concept Release on Equity Market Structure (Release No. 34-61358)