Saudi Exchange will introduce a new mechanism for executing market orders in the Main Market and Nomu-Parallel Market from Sunday, October 4, 2026.
Under the updated system, market orders can continue matching against available liquidity across multiple price levels, within a range of up to five price-tick units from the best available price. Previously, an order would stop after matching at the first available level, with any unexecuted portion converted into a limit order at the execution price.
The change is designed to increase the amount of a market order that can be executed immediately when additional liquidity is available at nearby price levels. The order may continue matching until it is fully executed, reaches the five-tick range, or no further executable quantity is available.
Any remaining quantity will become a limit order at the last execution price. Saudi Exchange said the update does not guarantee full execution, as the final amount still depends on liquidity in the order book. Market orders will also retain their existing execution priority.
The new mechanism applies to cash-market instruments in the Main Market and Nomu. Derivatives-market instruments are excluded.
Source: Jawlah
