I had read that Interactive Brokers (IB) will close the EFP for you automatically at expiration and I thought I'd put that to the test. Well, they did and what's more, there was no commission charged that I could see. So my total cost for this venture was 50 cents and the position closed at a profit, of course. Now one thing that isn't easy to find is the cost basis on the statement. I can probably go back in the statements and see what it was, determine my basis and time in the position to get pretty close to my APR, but what a pain. So I say if this is the best complaint I can come up with, then I would say it was quite a success.
So now I'll be scanning the EFP list this morning to find another one to enter. Interactive Brokers has a list available to the public to look for decent EFPs. I'm sure it's on their site somewhere, but I usually use the one here. Of course, click on the EFP Int tab. I believe this is only updated during market hours.
A couple of words of caution. First, I let this one go until expiration. I did notice during the duration of holding this that the P/L at any given point was all over the map. I assume this is from liquidity issues on the SSF and the price of it trading at a premium or discount to the underlying. So if you ever find that you need to exit this early, you might be in for a suprise (and it will probably be unpleasant). Second, I'll need to do more reading, but it wasn't entirely obvious how to close this position manually. If you have a stock, option or future position, you get a "Close Position" choice when you right click on your open position in IB TWS. No such thing for the EFP. I assume I can put in a limit order at the interest rate going the other and get it to close, but why make me guess? Finally, I'll stress again, watch your cash balance. Since SSFs are marked to market, you could show a loss on the SSF and need to come up with cash. If you don't have the cash to settle then you're borrowing at the broker rate, which I assure you is higher than what you're getting on your EFP. Just pay attention.