If I close my short option position before the close, am I at risk of being assigned on that contract?

If you are holding a short position, there is no option on the TWS to "cover". Rather, you will simply place a buy order to buy back the number of shares or contracts you are short. For example, if you are short 100 shares, you can close your position by placing a buy order for 100 shares. You can also right click on your position at any time and use the "Close" button at the top of the right click window to initiate a closing order…

Any short American Style option can be assigned before it stops trading. Option assignments are a double random lottery, so you could get assigned on one or all of the open short American style options in your account before the short option expires. The earliest you would see an assignment to the account is after the IBKR system overnight refresh is completed sometime between midnight and 2 AM EST. Option assignments are processed overnight and…

If the short call leg of a covered write position is assigned, the long stock position will be applied to satisfy the stock delivery obligation on the short call. The price at which that long stock position will be closed out is equal to the short call option strike price…

If you close a securities position which resulted from an option assignment on the date it was assigned to your account, it will be considered a day trade.  Similarly, if you close a securities position which resulted from an option exercise on the date it was exercised to your account, it will be considered a day trade…