I had sold 5 naked $35 puts on Cell a few weeks back, the stock had a 3 for 2 stock split and my calls were adjusted to reflect the new price of 23.33. On option expiration the 5 calls were trading at exactly at the diffrence of 3.77 (stock was at 27). The loss to me if I were to cover was 5*3.77=1885. Today I come in and I am short 750 shares, loss is 3.77*750=$2,827. Can someone explain this to me? If I were a pruchaser of the calls I would basically have made free money. How is this possible? Is my math wrong? ANy help would be appreciated
The price gets adjusted and your contracts do as well. 3 for 2 results in you receiving 7.5 contracts instead of 5. Although I think you may have sold calls instead of puts? given the math and prices in your post???
IB in the past has screwed up the strike price (adjusting for the 3 for 2 twice instead of once) However, in this case it appears that this was not the issue. The multiplier in this case was 150 not 100. If you sold the option after the split you should have received 150 times the price not 100. In order to verify, you should go to the OCC website and check for information on the equity in question.
http://www.optionsclearing.com/market/infomemos/info_memos_form.jsp type in the symbol and use "Contract Adjustment Memos"