There's truth to what you're saying; assuming one knows where relative medium term peaks and troughs are in multiple asset classes. That's a whale of an assumpt

There's truth to what you're saying; assuming one knows where relative medium term peaks and troughs are in multiple asset classes. That's a whale of an assumption. As is the assumption that fossil fuels are going to be higher growth rate over the medium term. Your strategy also requires attention and likely incurs more transaction costs if executing it yourself. I thought I would do a ballpark check. Random first index of oil & gas I found was FTSE 350 Oil & Gas. Start 2010 value: ~7914. Start 2020: ~8253. Return: 1.043. General FTSE350 at the start of 2010: 2718. Start 2020: 4311. Return: 1.59. So we'd have done better buying a fossil fuel divested index 10 years ago. I see no reason to think this trend will reverse. The fundamentals to me are that fossil fuels are likely only see more regulation, divestment and less importance to new technologies. While the upside wildcards in energy are most likely not in fossil fuels.