Shorts don't expire. It's either set up in agreement between the borrower and lender or the lender can recall them at any time. Options do expire though, which is what we're talking about when we say contracts. You can open a short position by writing (selling) a call option to someone else.

Shorts don't expire. It's either set up in agreement between the borrower and lender or the lender can recall them at any time. Options do expire though, which is what we're talking about when we say contracts. You can open a short position with by writing (selling) a call option to someone else.