I'll turn this around: Do you think it is acceptable for policymakers, lawmakers or people involved in such a process to reap profits more or less directly with (partially non-public) knowledge they've acquired?

Because I think not. And I feel pretty strongly about this. The conflict of interest is so glaringly obvious that it should be completely self-evident why every voter should want to prevent, ban and punish any such action.

I feel that anyone involved in this tariff insurance business should be able to prove without a shadow of doubt that they had no political insider knowledge about the whole thing, and I'm extremely skeptical that this is the case (just from the pople involved alone!).