Glen Allen, VA-Based Insurer Markel Corp Generated 4Q 2017 Net Income of $439 Mil, Up a Blistering 230% or Up $306 Mil Over the 4Q 2016 Net Income of $133 Mil ....................................................................................... $340 Mil or 111% of the $306 Mil Net Income Improvement From the 4Q 2016 Was From a 4Q 2017 Income Tax Benefit of $340 Mil Resulting From the Incredibly Favorable US Tax Debt Forgiveness Feature in the US Trump Tax Bill