These are simply not the low levels that need defending. If the bought now they will have nothing left to reallp step in at $385 , remember it was there. Doubt they have really bought very many shares back yet, but WHO here or anywhere outside the compnay knows!
You are assuming that they are not and having been buying back. My opinion is that they have bought back an enormous amount of stock already. I think we are going to be very surprised at how much stock they have bought. I think that the selling here is so pervasive that it is blowing through the buyback.