But this wouldn't really be a return-maximizing strategy, would it? I wouldn't expect to hold the same stocks for the entire 30 years, rather I would be constantly looking for medium-term gains and then trying to lock them in once I think they've peaked. I.e., maybe I think fossil fuels are going to continue growing for at least a 5-year time frame, and then maybe around them, I would re-evaluate whether that's still true. In other words, the return-maximizing strategy would seem to be to treat them like any other investment.