Quote from mgarc:
come on guys, before you say something, make sure it's correct. yes you can carry back losses, and yes you will get a refund.
look at 2011 IRS publication 550, page 41.
advantage of carryover is the possibility that tax rates will increase in the future. that is if you are confident of making money in the years ahead.
Egg on my face.
Back when I had an accountant, I had losses in 2000. He told me I couldn't carry a loss back, only forward. I believed him.