Best guess is higher interest rates. For what ever reason the stock does selloff when Interest rates go higher. In reality the two year being say 3.5%-3.6% to 4% shouldn't cause this kind of a selloff (Go look at a chart of the two year, it looks like the opposite (As yields go higher) of AES (Goes Lower) this past month, but for whatever it seems to. Since I think Interest rates are now at the upper end of the range here, and stock is at the bottom end of the range, and the stock is very cheap fundamentally, I think it is a good opportunity in a overall rich market. Time will tell. All is just my opinion, and I could always be wrong though.