Mr Cooper Group Inc (COOP)

[Evintos]

Most if not all brokers will do that unless you have a "AON"/all or nothing condition set on your order.

The problem with AON orders is that depending on the quantity, the order may or may not execute immediately (immediately = less than 5 seconds) or execute at all.

AON places the condition that the broker must be able to buy/sell all quantities before the order is executed. No partial orders will be filled.