London Stock Exchange Group data suggests clean energy, efficiency and water companies have compounded at 18% a year since 2008, against 12% for the broader market, with energy security, grid reliability and supply chain risk replacing climate policy as the primary demand driver…
The green economy has stopped asking Washington for permission.
A London Stock Exchange Group tally, relayed by columnist Mark Gongloff, puts the market value of self-described green-revenue companies at $10 trillion (Gongloff column, July 1, 2026). Treated as a single sector, only technology and industrials would sit above it on global cap tables. Healthcare would be fourth. That is not a sustainability pledge rendered in market value. It is a sector that has learned to compound on its own economics.
Two numbers from LSEG do the load-bearing work. Since 2008, green-economy valuations have grown 18% a year, against 12% for the broader market, per Gongloff's read of the data. Cumulatively, that is 133% of outperformance versus global equities, per the same dataset. Last year, green revenues grew 5.3%, the fastest pace since 2022, the year the U.S. Inflation Reduction Act cleared Congress.
The political backdrop matters, but not in the way cable news has spent three years suggesting. The Trump administration has rolled back climate supports and weakened the U.S. commitment to Paris-aligned targets. By the prevailing 2023 narrative, that should have killed the trade. LSEG's data is the contrary fact: the sector kept compounding. As Gongloff frames it, the resilience of the green economy no longer runs through climate policy. It runs through boardroom economics.
The new drivers are unglamorous and old-fashioned. Energy security, the kind priced into utility bills after the Iran war pushed oil and grid risk back into the foreground. Grid reliability, the kind a hyperscaler thinks about before it signs a power-purchase agreement. Supply-chain security, the kind a Fortune 500 chief procurement officer raises when a single country's rare-earth or battery materials policy can freeze a product launch. Matthew Roling, an assistant professor and founding executive director of the Abrams Climate Academy at the Kellogg School of Management at Northwestern University, put the framing plainly in a statement relayed by Gongloff: "What the LSEG data shows us is that the green economy's resilience is no longer dependent on politics. Energy security, grid reliability and supply chain security are now the primary drivers" (Gongloff column, July 1, 2026).
That is the reframe. Five years ago, the bull case on clean energy ran through subsidy schedules, tax credit cliffs, and which party held the House. The case still uses those inputs, but the marginal investor is now pricing a different risk ledger: a fired-up Middle East, an aging U.S. transmission grid, and a manufacturing base that gets repriced whenever one country adjusts export controls. Climate is the byproduct of those decisions, not the premise.
The caveats are honest and worth keeping. Past-year outperformance was partly a tailwind from the Iran war, which lifted fossil-fuel-exposed names and grid-security plays inside the green bucket. Some of the Inflation Reduction Act's supply-chain money has not yet unwound, so a clean read on the post-IRA baseline is still a year or two out. Permitting and grid build-out remain real bottlenecks, and an index-level surge in market value does not change the fact that getting electrons from a new wind farm to a substation still runs through a multi-year interconnection queue. Gongloff flags each of these limits in his column rather than papering over them, and the column's strength is that it lets the LSEG numbers carry the load while still naming the drag.
The FTSE Environmental Opportunities All Share Index, a basket of companies with material exposure to environmental solutions, beat the FTSE Global All-Cap Index by 12% over the past year, per Gongloff's read of the data. That spread is a useful reality check on the long-run 133% cumulative number: the green basket is winning on a one-year window as well, even with political headwinds, even with permitting drag, even with the Iran war's distortion of the fossil-fuel benchmark.
The watch items are concrete. Whether the Inflation Reduction Act's remaining supply-chain incentives actually expire, and on what schedule, will set the post-policy baseline. Whether permitting reform moves through Congress, or stays stuck in committee, will determine how much of LSEG's $10 trillion cap is backed by electrons that actually flow. And whether the Iran war's effect on oil and grid-security names fades or persists will shape what "green" means inside a benchmark for the next several quarters. None of those questions are about whether the sector still needs Washington. The data point is that it does not.