When trying to time a buy in or a move out on a down or up day (respectively) are there numbers on how close the 11:30 a.m. numbers correllate to the ending numbers? Nothing is going to be for sure but is it correct that the 11:30 numbers tend to be within a 1% spread? In other words if the Dow is up 2% at 11:30 a.m. the close is likely to be between up 1% and up 3% more often than not? Since TSP traders have to decide before noon, just wondering if there are statistics to help predict closing based on 11:30 numbers.