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.
Increase in value of property due to market conditions. When you sell appreciated property, you pay tax on the appreciation since the date of purchase. When you donate appreciated property held long term, you may generally deduct the appreciated value.