[AnthonyMouse]

Ignoring the obvious goalpost move from "the same corporations doing both" to "there are some oligarchs with widely diversified investments", you would then have the problem that your claim isn't true. It is actually the corporations rather than the shareholders doing this. The executives of Exxon don't want a carbon tax and perform machinations to prevent it. Some oligarch who has 4% of their holdings in energy companies is just going to have their fund manager get the inside story on whether the bill is going to pass and then shift around their holdings accordingly.