What happens if I short an in the money call option and it expires.?

depends on how expires.

let's sold $10 call when @ $12 $3.

option 1
first read shorted in money call , expires in money @ $14. if that's case, stock called out , either sell stock, or short stock @ strike price.

in case, short 100 shares of stock , received $1000 (less exercise costs). stock worth -$1400, luckily got $300 ($3x100 shares), you're down $100 plus numerous commissions.

option 2 - expires in money @ $11
in case, you're short 100 shares again @ $10/share, getting $1000 less costs. can buy first thing on monday $1100, losing $100. $300 got selling call, end ahead, net $200.

option 3 - stock closes @ or below $10 (the call's strike price) on expiration friday. call worthless. made $300.

sure you're comfortable whatever stock you're shorting because when short calls, have unlimited risk. if goes $20, you've sold stock $10 that's worth $20 buy back, etc.

let me know if have questions.

hope helps!

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