Agree with most of 911's submission except "tax loss selling is done". That period is not really complete until January 24th which signals that the "30 day period" is over and any new purchases do not impact the validity of the tax loss transaction. Truly "big" players can play this game and then get back at it wholeheartedly utilizing of course all of the funds generated by the "loss transaction".
The net result is that they can book the tax loss but retain the same number of shares at the lower price level.
Onward and Upward