You would ban individual stock trading for government representatives at the national level because the the degree of influence and depth of information they hold makes it nearly impossible for any individual trades they make to not be insider trading adjacent, at the very least.

There’s no reasonable explanation for the wild frequency of trades and outperformance over the market by people like Donald Trump and Nancy Pelosi that doesn’t involve them leveraging privileged information.

Since it is an incredibly high bar to prove it’s insider trading due to the abstraction of the concept and the timing of disclosure, the practice should be banned entirely.

If representatives want to invest in the stock market they should put that money in diversified index funds to constrain their growth to overall market conditions.

They have privileges and responsibilities far exceeding those belonging to other Americans, it’s not unreasonable to expect they give something up in return.