Archived explainer. For the current picture see today's SMR page.
Why Is NUSCALE PWR CORP A (SMR) Stock Down Today?
By the Top Tier Newswire AI Desk · September 18, 2026 at 10:18 AM ET · reviewed against 10 wire stories
NUSCALE PWR CORP A (SMR) is down -5.42% in the latest session. Our newswire has captured 10 stories on SMR across 8 sources in the last 36 hours, with AI sentiment reading mixed (avg 55/100).
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NuScale Power stock fell 5.42% to $8.55 in intraday trading on Thursday, marking a sharp reversal from earlier gains. The decline followed a broader market reaction to mixed news in the small modular reactor (SMR) sector, including a failed attempt to pass a nuclear-specific order in the House and a downgrade from UBS. While the sector had rallied earlier in the week on policy developments shifting grid costs to data centers, the stock’s intraday weakness reflected renewed caution among investors.
What Happened
NuScale Power opened Thursday at $9.09, a modest 0.6% gap up from the prior close. The stock briefly reached a high of $9.21 within the first 15 minutes of trading but quickly reversed course, falling to a session low of $8.54 by 10:15 AM ET. The decline followed a downgrade from UBS, which cut the stock to Sell and cited a 40% potential downside. The downgrade came amid a broader sector rally earlier in the week driven by the House passing the Ratepayers Protection Act, which aims to shift grid costs to data centers. However, the House vote fell short of including a specific nuclear order, tempering some of the optimism. Meanwhile, Holtec, a competing SMR developer, canceled its IPO, raising concerns about the sector’s broader challenges.
What The Data Shows
NuScale Power’s stock has been volatile in recent months, with a 52-week range of $7.21 to $57.42 and a price trend of -20.1% over the last 8 sessions. The stock printed one fresh 52-week high and 17 fresh 52-week lows on September 18. Intraday volume of 6.0 million shares was below the 3-month average by 80%. On the fundamentals, the company remains unprofitable with a trailing 12-month revenue decline of 81.0% and an EPS of -1.54. Insiders have sold a total of $1.0 million worth of shares in the last 90 days, with the most recent filing on September 11.
What To Watch
Investors should monitor the company’s next earnings report for insight into its financial progress. Coverage breadth remains active, with 10 stories from 8 sources in the last 36 hours, but sentiment appears mixed.
AI-assisted analysis composed exclusively from headlines and data on the Top Tier newswire. Public view is delayed 4 hours from real time. Not financial advice.
SMR · today's session (5-min) · -7.02% vs prior close · updated 3:39 PM ETAI sentiment, last 36h · averaged over 10 stories · 55/100 bullish
The headlines behind the move
Story flow · 6 stories on the wire, last 36h · hover or tap a dot for the headline
7h agoTipRanksBULLISH 67General
Nuclear Stocks Oklo, NuScale Power, and X-Energy Jumped on Sept. 17 — Here’s Why
Shares in small modular reactor producers Oklo ($OKLO), NuScale Power ($SMR), and X-Energy ($XE) all surged on Thursday. XE stock led the rally, jumping by 12.08% t...
18h agoStocktwits NewsBULLISH 64General
Why Did Nuclear Stocks OKLO, SMR, NNE, LEU, XE Jump On Thursday?
Nuclear stocks jumped after the House passed the Ratepayers Protection Act, which aims to shift responsibility for paying for power upgrades from consumers to tech and data center companies, on Wednesday.
23h agoTechStock²BULLISH 63General
Oklo Stock Rises 11%, NuScale Gains 9%; House Vote Stops Short of a Nuclear Order
Oklo stock closed 11.26% higher at $39.63 on Thursday and NuScale Power gained 9.16% to $9.06 after the House backed a plan to make large data centers shoulder more of the grid costs created by their electricity demand. The vote gave investors a reason to favor companies pitching dedicated power, but it did not award…
1d agoThe Motley FoolBEARISH 32General
SMR Developer Holtec Just Cancelled Its IPO. Should NuScale Power and Oklo Investors Panic?
Holtec's CEO warns that "a perfect storm" has arrived.
1d ago24/7 Wall St.BULLISH 67General
Oklo Jumps 13%, NuScale Power Climbs 10%: Does the House Data Center Power Vote Reach Nuclear?
Shares of Oklo (NYSE:OKLO) and NuScale Power (NYSE:SMR) are leading a nuclear rally in Thursday morning trading after a House vote that sharpens the case for dedicated data center generation. Oklo stock is up 13% to $40.37, while NuScale Power stock is up 10% to $9.14. Both moves put the two reactor developers well ahead […]
1d agoGlobeNewswireBULLISH 63General
Small Modular Reactor Market Outlook 2026-2035 - Featuring Profiles of NuScale Power, Rolls-Royce SMR, and GE Hitachi Nuclear Energy
Small Modular Reactors Gain Momentum as Clean Energy, Energy Security and Industrial Power Demand Drive PWR Deployment and North American Leadership...
2d agoYahoo TopBULLISH 63Product/PR
NuScale Power Just Solved a Major Engineering Hurdle: Is the Stock a Buy?
NuScale's recent breakthrough moved its small modular reactor one step closer to commercial deployment.
3d agoYahoo TopBULLISH 63General
Europe Bets Big on Small Modular Reactors. Here's How NuScale Power and Oklo Will Benefit.
The European Investment Bank is ramping up investment in small modular nuclear reactors, or SMRs.
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