Capital Floods Into Nuclear ETFs as AI Data Centers Strain the US Grid

Capital Floods Into Nuclear ETFs as AI Data Centers Strain the US Grid Hyperscaler power deals and reactor restarts are pulling traders into uranium and nuclear-developer funds, but reactor costs still sit above market power prices. The Global X Uranium ETF (URA) was last quoted at $45.52, up 1.16%, as of 2026-06-13⁷. Behind that quote is a fast rotation of capital into companies that can feed power to AI data centers, with nuclear and renewable baseload pitched as the cleanest way to relieve the supply crunch¹. The reason traders care is load growth. US generation tied to data centers is projected to climb from about 5% of the total to roughly 15% over five years, a step change on a grid that has barely grown since 2000⁷. Demand, not supply, is now the constraint. Japan shows the same pattern. Its data centers will draw as much electricity as 15 million to 18 million households by 2034, accounting for 60% of the country's power demand growth, as hyperscalers commit $28 billion (4 trillion yen) after Tokyo named Oracle, Google and Microsoft official cloud providers⁵. A country that imports roughly 90% of its crude is now looking harder at nuclear to insulate its grid from supply shocks³. Nuclear fits the load profile. A 1 GW reactor sits on a fraction of the land an equivalent solar build needs and runs at capacity factors above 90%⁷. Washington wants to quadruple capacity, from roughly 100 GW in 2024 to 400 GW by 2050². That is a 25-year ambition, and the buildout has barely started. The deals are real. Microsoft signed a 20-year, 835 MW power purchase agreement with Constellation Energy in September 2024 to restart Three Mile Island Unit 1, a $1.6 billion project now targeting a 2027 start⁷. Idaho National Laboratory has partnered with NVIDIA on an effort to use AI to speed reactor development, aiming to cut build times and operating costs by up to 50%⁶. That is the case the ETFs package. URA offers the deepest liquidity and the purest uranium-price exposure, with $6.86 billion in assets⁷. The Uranium & Nuclear ETF (URAN) carries unique exposure to Japanese and Korean reactor builders at a lower cost than rivals, with an expense ratio of 0.85% on roughly $841 million⁷. NUKZ has returned about 52% over the past year and roughly 11% year to date through late May 2026, trading near $71⁷. Equities are running with it. Fluence Energy closed at $24.16 on May 8 (2026-05-08), up 98.2% in a single week after disclosing master supply agreements with two hyperscalers and a record $5.6 billion backlog¹. The company turned a positive adjusted EBITDA of $2.0 million in Q1 2026, its fourth straight quarter in the black, with non-GAAP gross margin at 52%¹. Then there is the wall. Barclays has noted that both conventional reactors and SMRs cost more than the current market price for power⁴. SMR startups have raised more than $1 trillion in implied market value, money betting that costs come down before contracts come due⁴. Fluence shows the other side of the trade. Shares are still down roughly 39% year to date, a reminder that the appetite is narrative-led and the cash flows are thin¹. The trade rests on hyperscalers signing enough long-dated PPAs to make reactor economics work; if construction delays or regulation push restart costs higher, the gap between a 20-year contract and current power prices widens⁷. The variable that decides it is the cost of capital for restarts: stay cheap, and the project queue keeps growing⁴.