Order Book Fragmentation

Order book fragmentation occurs when liquidity for a single asset is spread across multiple, disconnected exchanges. This results in different prices for the same asset at the same time, creating inefficiencies and making it harder for traders to execute large orders without significant slippage.

Arbitrageurs play a vital role in connecting these fragmented books, as they buy on the cheaper exchange and sell on the more expensive one, eventually narrowing the price gap. However, this fragmentation increases the complexity of trading and requires sophisticated tools to manage execution across venues.

For derivatives, it can lead to inconsistent funding rates and varied margin requirements, further complicating the risk landscape. It is a structural byproduct of an open, multi-venue financial ecosystem.