My ITM short puts on TSLA at strike 1200 got assigned. But on the TWS quote monitor, it says my average trade price is 1159.61 rather than 1200. I called IB but they couldn't tell me why.
Last week I sold 5 put contracts of SPCE at strike 14, and the trade price was 0.09 and the average price was close to 0.09; however, today, TWS says my average price was 0.00;
What is going on here? Anyone has similar experiences with IB?
