They are walking down the price in an attempt to lower the carrying costs of the short. They tried to do this yesterday but buying came in near the close and they were unable to do it.
I hope that repeats today. ( In case you have added to your stash please remember to place GTC's at high prices on those shares so they are not lent out by your brokerage firm and the rate charged on borrowed shares will be higher) Go iPIX!!!