So they resume trading on Friday... ie. no new money to the exchange before the weekend. This can get rough.
What effect do you think resuming trading with no new money to the exchange before the weekend will have?
Imagine a world where there are people ready to prey on other peoples unease. Then imagine the knights in shining armour being forced to wait over the weekend to get their horses out of the stable. What have you got then?
https://www.youtube.com/watch?v=EM4vblG6BVQ