As you likely know by now, the Tax Cuts and Jobs Act (TCJA) reduced or eliminated many deductions for individuals. One itemized deduction the TCJA kept intact is for investment interest expense. This is interest on debt used to buy assets held for investment, such as margin debt used to buy securities. But if you have investment interest expense, you can’t count on benefiting from the deduction. 3 hurdles There are a few hurdles you must pass to benefit from the investment interest deduction even if you have investment interest expense: You must itemize deductions. In the past this might not have been a hurdle, because you may have typically had enough itemized deductions to easily exceed the standard deduction. But the TCJA nearly doubled the standard...