Swiss Bank UBS Group's 4Q 2017 Earnings Crushed By the US Trump Tax Bill's Required Write-down of Its Deferred Income Tax Assets, Which Amounted to CHF 2.9 Bil ...................................................................................... This Write-down of CHF 2.9 Bil is Due to These Assets Being Worth Much Less Due to the US Trump Tax Bill ..................................................................................... On the Positive Side, UBS Group's 4Q 2017 Income Before Income Taxes Were Up 34% Over the 4Q 2016