Fossil fuels were the worst performing sector in the ASX 300 over the last decade. $100 invested in the fossil fuel dominated S&P ASX 300 Energy index in 2010 was worth just $104 by January 2020, dropping to $51 with COVID. $100 in the wider market peaked at $237, falling to $169 with COVID. Excluding fossil fuels from a portfolio of the ASX 300 would have increased returns by 8.6% over the decade.