Definition
Pre-funding is the requirement to deposit capital at a trading venue before submitting orders, so that executed trades can settle out of the pre-positioned balance. Crypto exchanges typically require pre-funding for both legs of a trade (both the quote currency and the base asset), which means firms trading across many venues distribute capital across all of them, reducing effective buying power at any single venue. Pre-funding is the capital-efficiency problem that atomic settlement rails and prime brokerage structures exist to solve.
Example
A market maker trading across 20 venues must deposit capital at each one before trading, leaving effective capital per venue at 1/20 of total buying power. An atomic settlement or prime brokerage arrangement reduces this drag by settling directly from a home custody account, freeing up 20-35% of capital per Kinexys 2026 research.
How Liquid Mercury Handles This
Mercury Pro's SOR is pre-funding-aware: routing decisions factor in available capital per venue, and the platform supports atomic settlement and prime brokerage integration where available to reduce the pre-funding drag.