I've been trying to find a way of getting S&P fair value daily. I know of sites like indexarb.com and programtrading. But I don't have a clue as to how to get the fair value from there. Fro example, I get the previous day's day fair value from CNN.com and it's at 1338.52 . For some reason the fair value for today is not updated, where can I get the info then? When I checl on Indexarb.com, it give a price like $9.20. So, do I add $9.20 to 1338.52 or do I subtract that? How do I derive the fair value from the info from Indexarb? I really need some help with this .. thanks!