I noticed that with about a week until expiration, a deep itm option on the s&p index xsp has about $15 more time value than the same strike put, I guess due to interest rates? Would being long a future instead of the deep money option have any cost savings, or would the future also decline in price by about $15 in a week because of interest rates? When looking at the different expiration's of ES futures, they only seem to be about a quarter point different, which I would have thought would be a lot more if interest rates are affecting the futures. Thanks.