Buying EOD allows for drawing less attention Buying in the middle of the day allows for too many variables
Sell in the AM Create FUD Buy quietly at the close (This has been the drill for awhile now) Not as many notice EOD volume Most traders are looking for liquidity during the day and are more reluctant to trade when retail sees selling the next AM FUD sets in again...
Best way to accumulate without setting off alarms, looking attractive and driving up the price
I believe the end of day block trades are the result of an institutional order placed earlier in the day. The market marker buys (and take out stop losses) throughout the day and reports the block trade at the end of day. The increase that proceeds the reporting of the block trade is most likely the market marker making one last push to buy all that is available. This has been the MO the past couple of weeks or more.