Bank Of America 4Q 2017 Earnings: I Wish I Could Understand Why the Earnings Charge For the Impact of the Trump Tax Bill is Only $2.9 Bil When the Dec 31, 2016 Net Deferred Income Tax Asset (DTA) Was $19.2 Bil, Including $9.2 Bil DTA Just For Net Operating Loss Carryforwards, and Given the 40% Cut in the US Federal Income Tax Rate From 35% to 21%