But ethics experts say the bill has a major loophole when it comes to blind trusts, and is too broad.
Broadly speaking, a blind trust is a financial arrangement wherein people turn over their assets to be managed by an independent entity to prevent a conflict of interest.
Several previously-introduced bills to ban stock trading allow for lawmakers to place their stocks into a blind trust, rather than fully selling off existing stock holdings.
"You'd be able to create any kind of a trust you want to, put anything you want into it, and call it a blind trust, even though there wouldn't actually be any way to prove that it is, in fact, a blind trust."
Payne also said the blind trust loophole was a "small risk," but that in an optimistic scenario, "that language allows this law to grow for future circumstances that you just can't be prepared for."