“Irrational exuberance” was a phrase coined by Alan Greenspan, former chairman of the Federal Reserve, to describe a market driven by enthusiasm rather than fundamental analysis. This term can describe any asset, whether it is a stock or a piece of property, whose true value is obscured by wishful thinking and a sense of volatility, making the value of the asset much higher than it is really worth.
If you noticed the title stock of this piece, you can guess where this is going. That’s right (NYSE: OKLO)the Sam Altman-backed nuclear startup and stylish reactor design that fueled the hottest market rally in 2025, now up more than 40% in 2026.
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By the numbers: If you had invested $10,000 at Oklo’s peak in mid-October 2025, your investment would be worth about $2,840 right now.
But let’s leave that in the past, and turn our attention to the future. In this brutal sell-off, is the company’s future still worth investing in? Or has Oklo stock already seen its best days?
Oklo was always a dangerous idea. Not just because its industry is highly regulated — no one wants to repeat Chernobyl — but because its core concept has never been implemented on the commercial scale that Oklo desires.
That “main idea” is of course, the micro nuclear reactor. Oklo’s version — the Aurora powerhouse — is designed to be built in a factory and used wherever on-site power generation is needed. It sounds good on paper, especially as the demands increase with more power, but its authenticity has not been tested.
In simple words, investors don’t know how profitable it is this idea. We do not know whether the revenue generated from it will reasonably exceed the operating costs. We don’t even know how many customers Oklo will be able to sign, or if it has what it takes to control a large portion of the utility market. These unknowns are on top of the regulatory risks — most importantly, getting a commercial license — that prevent them from making money today.
Despite this unknown, Oklo has an $8 billion market cap. That’s more than double the amount of Oklo’s competitor, Power of NuScale (NYSE: SMR)which actually you have a small reactor design approved by the Nuclear Regulatory Commission (NRC). The fact that NuScale commands a $3 billion market cap despite leading Oklo in the race for control speaks volumes for the kind of hype that has been clouding Oklo’s sails since going public in 2024.
To reinforce this point, consider the expected earnings growth for both nuclear energy stocks:
To be honest, I get why investors are drawn to Oklo. In the last two years, it has made a big move in the data center area of artificial intelligence. It is partnering with the Department of Energy to accelerate the timeline for obtaining licenses, and it is not hungry for money, about 788 million dollars by the end of 2025.
But at this point, investors have the right to ask: So now? Why should I believe that small nuclear power plants, which make up a small part of our current energy environment, will be so powerful that Oklo’s value will double or triple from here? Without more physical evidence, it’s hard for me to imagine that Oklo’s design won’t be the only option in the future what you like generating electricity off the grid.
With interest rates still high, and increasing competition from other clean energy companies — such as Bloom Power — The current sale of Oklo has many reasons. At this point, it would be more prudent to invest in a nuclear energy exchange-traded fund (ETF) rather than a single early-income company like Oklo.
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Steven Porrello holds positions in Oklo. The Motley Fool positions and recommends Bloom Energy. The Motley Fool recommends NuScale Power. The Motley Fool has a policy of disclosure.
Millionaire-Maker or Market Hype? The Honest Truth About Oklo was first published by The Motley Fool
