Barnes amd Noble (BKS)

Weird there earnings were better than expected and the stock falls 3% today.  Stranger is it was up 7% in pre-market trading.  I guess it fell back on short term profit trading.  Thing is the Nook business, .which is being spun off, is worth $20 a share!  The shares are currently trading below $12 a share.  What a great buying opportunity this is.  Thanks for reading and goof luck investing.  Tony