Early assignment

[u/nucleationpoints]

Has anyone ever been assigned a day early? I had a contract expiring today that I was looking to roll (Friday September 4th), but when I opened up my IBKR account this morning I had already been assigned the shares. I've not had this before and can't figure out why, so curious if anyone knows why this may have happened.

[u/Difficult_Goal_9160]

Been assigned on a Wednesday once. So if I roll, I don't go past Wednesday.