As someone once explained me when I asked the question " Why the price is falling ? " his answer is to the point and accurate. He said it falling because " Someone is selling at that rate ". yeah this is exactly the case now.
  I won't call it a fall its just 10-15$ short of 600 and I won't be surprised even if it goes down to 550$ i might call it a fall if it sinks to 530$ or below but there are enough reasons for that. auction , ghash +lots of other crap.