The Morningstar US Sustainability Index is up 4.3% through April 24, 2026, trailing the broader US market by 0.9 percentage points. That gap is the number Gates's critics will cite. The number they will ignore is that the Developed Markets Sustainable Activities Involvement Index is up more than 16% over the same period, with Micron Technology alone contributing 6.18 percentage points after a 74% stock price increase. ESG performance is not a single line. It is a collection of strategies with very different exposures, and treating them as one thing is the first analytical mistake in this debate.
The Energy Problem Is Real, and Temporary
Gates's underlying concern has a legitimate foundation. Sustainable funds structurally underweight energy, and when energy drives the market, they bleed. The US Sustainability Index holds only 2.8% in energy stocks. In 2022, when Russia's invasion of Ukraine sent energy prices surging, that index posted its worst performance since inception in 2016. Alyssa Stankiewicz at Morningstar put it plainly: sustainable funds generally underperform when energy drives the market. That is not spin. That is the data.
But the Gates argument, as typically framed, treats energy-driven cycles as the permanent condition rather than the exception. Global investment in the energy transition reached $2.1 trillion in 2024. The International Energy Agency says annual clean energy investment must reach $4.5 trillion by 2030 to stay on a net-zero pathway. The capital is not flowing toward fossil fuels at that scale. The structural bet embedded in ESG portfolios, that clean energy and efficient technology will attract more capital over the next decade than legacy extraction, is not obviously wrong.
What the 2026 Data Actually Shows
This year is instructive precisely because it should have been bad for ESG. Software stocks, which sustainable strategies overweight, have struggled. Energy stocks have soared. Under those conditions, the standard prediction is significant ESG underperformance. Instead, AI infrastructure companies with energy-efficient profiles drove the Developed Markets index to a 16% gain. The market rewarded the intersection of technology and sustainability, not despite the energy rally but alongside it.
I will grant Gates this: if you believe energy markets will be structurally tighter for the next 20 years, driven by geopolitical fragmentation and underinvestment in new supply, then ESG's chronic underweight in that sector is a genuine long-run drag. That is a coherent view. I just do not think the capital flows support it.
The more useful question for investors is not whether ESG funds will underperform in aggregate, but which ESG strategies carry the structural exposures that match their actual investment thesis. The Paris Aligned Benchmark is up only 3.7% year-to-date. The Developed Markets Sustainable Activities Index is up 16%. Both are "ESG." They are not the same product, and conflating them produces commentary that generates clicks without generating insight.
Fund selectors should stop buying ESG as a category and start reading what each strategy actually owns. A fund with zero energy exposure and heavy software concentration is making a specific macro bet. Investors deserve to know that before they buy the label. Asset managers who market these products as simple ethical screens while obscuring the sector tilts are doing their clients a disservice that no amount of sustainability reporting corrects.
Gates is right that ESG is not a free lunch. He is wrong that the long-run case is closed. The $2.1 trillion already flowing into the energy transition is not a narrative. It is a capital allocation fact, and capital allocation facts tend to show up in earnings eventually.
