You've probably already seen this, but on the off chance you haven't, it deserves to be read in full.  (It's a short article.  It will only take you 3 minutes.)
From the New York Times:
They. Sold. Their. Stock.
They could have made a difference, but they made a profit.

The article includes a quote from another piece by Tucker Carlson, which I'll also reproduce here:

Tucker Carlson, Fox News:
[Burr] had inside information about what could happen to our country, which is now happening, but he didn’t warn the public. He didn’t give a prime-time address. He didn’t go on television to sound the alarm. He didn’t even disavow an op-ed he’d written just 10 days before claiming America was ‘better prepared than ever’ for coronavirus. He didn’t do any of those things. Instead, what did he do? He dumped his shares in hotel stocks so he wouldn’t lose money, and then he stayed silent. Now maybe there’s an honest explanation for what he did. If there is, he should share it with the rest of us immediately. Otherwise, he must resign from the Senate