Could a person attempt to take a position but mask his buying by using a market maker to accumulate shares during the day, but then print him the block during AH so that his print is not visible to the regular session traders? I saw a big 100,000 block in the AH at 4:31pm EST with little price change. (However, it was not printed on Inet's tape) So, my question is, is that how someone could attempt to not "show his hand"? Thanks
This can be done, the prints show up on my bloomberg after hours as an average price trade and have been done over the course of the day.