Interesting thing happened yesterday. The OEX settled at 746.75 yesterday. Options continue to trade until 4:15 est in this index. I noticed that call options that were expiring into cash were trading .05 over cash. For example the 745 calls were 1.80 bid, the 740 calls were 6.80 bid. This would seem like a free .05 (as it did to many people as over 1,000 traded in the last few minutes.) At 4:45 they remarked the OEX to 747.72, causing a $100,000 loss to whoever sold the calls to make a nickle. The SPX was also marked up by over a dollar. Apparently in APC there was a bad trade a second before the close (over 40 below the previous trade) that moved the indexes down in the last seconds. It took awhile to get this thrown out and recalculate the indexes.