Maker-Taker Model

A market participant who adds a resting limit order to the order book, thereby providing liquidity. In the maker-taker model, this trader receives a rebate for this passive action. The economic incentive is designed to tighten spreads and deepen the book. A maker's primary risk is adverse selection—being picked off by an informed trader when the market moves against their resting quote before they can cancel.

A market participant who executes against a resting order using a marketable order, thereby removing liquidity. The taker pays a fee that is structurally higher than the maker's rebate, generating the venue's profit margin. Takers prioritize execution certainty and speed over cost, often using aggressive orders to capture a fleeting alpha signal or hedge an existing position immediately.

The maker-taker model directly influences the minimum profitable spread. A market maker must quote a spread wide enough to cover the taker fee on the exit leg and still profit after the rebate. In highly liquid symbols, the effective spread often compresses to exactly one tick, as the rebate subsidizes the market maker's risk, allowing them to quote tighter than the raw tick size would otherwise economically permit.

A latency-sensitive strategy that exploits discrepancies in fee structures across venues. A trader simultaneously posts a bid on a high-rebate venue and an offer on an inverted venue, capturing both the spread and the combined rebates. This requires precise queue position estimation and low-latency infrastructure to avoid adverse selection. The strategy's profitability is a direct function of the net fee differential between the two exchanges.