03/05/2012 10:11:57 OFV = 1362.89 Sell to Close SPX at 1362.56 Spread = 3 03/05/2012 10:16:08 OFV = 1364.10 Buy to Open at 1360.92 Spread = 3
Note that spread is 2.5. This is different because VIX is above 20. Above 25, it drops again. The higher the VIX, the more responsive the model becomes.