This rule expired at the end of 2014 and has not yet been extended for 2015. Many believe it will be extended, but it is advisable to wait until later this year to see what Congress does before making any such transfer.
Depreciable property used in a trade or business and held for more than a year. All Section 1231 gains and losses are netted; a net gain is treated as capital gain, a net loss as an ordinary loss.