Defining Net Investment Income Under The Final 3.8-Percent Investment Tax Regulations July 9, 2014 ~ lsaret Lewis Saret recently posted a new article on his Forbes blog, which offers a detailed look at the Final NIIT Regulations provisions that define net investment income. Read the post here. Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading... Related Published by lsaret View all posts by lsaret