For a five minute period shortly after the open, FB traded in a 5 cent range, which is incredible considering it had just fallen 4 straight points in the previous 5 minutes.  It got stuck in the HFT tractor beam, between 38 and 38.05, as underwriters and HFTs battled it out.  Here is a detailed analysis of this battle:

* For more information on the HFT tractor beam, see CFA magazine – The HFT Tractor Beam.