This makes perfect sense as a "volume weighted ave
Post# of 148226
The buyer signs an agreement with the trader at market open to acquire some number of shares at the day's VWAP. The trader accumulates shares during the day, trying to beat that average price and so make a profit.
The transfer of those shares to the ultimate buyer, priced at the VWAP, obviously has to show up after the end of trading day, or you don't know VWAP. All the day's VWAP trades likely report together.
VWAP buyers are not retail (or are really, really big retail) so this number does tell you something.