6 Red Days In A Row: Oklo Stock Is Down 18%
A multi-day slide has erased significant market value, focusing attention on the company’s underlying financial picture.
Oklo (OKLO) stock has now moved lower for 6 consecutive trading days, posting a cumulative loss of 18%. That streak has erased about $1.4 billion from the company’s market value, which now stands at about $6.3 billion.
For anyone holding the stock, the sustained selling has pushed the price to a new 52-week low. Oklo stock trades at about $35.62 a share as of 9/16/2026.
How The Streak Stacks Up Against The S&P 500
Here is how OKLO stock stacks up against the S&P 500 over the streak and the periods around it:
| Return Period | OKLO | S&P 500 |
|---|---|---|
| 1D | -1.0% | -0.4% |
| 6D (Current Streak) | -17.8% | -1.6% |
| 1M (21D) | -18.8% | -2.5% |
| 3M (63D) | -38.0% | 0.5% |
| YTD 2026 | -50.4% | 10.3% |
| 2025 | 238.0% | 16.4% |
| 2024 | 101.0% | 23.3% |
| 2023 | 6.5% | 24.2% |
What do the fundamentals show?
The company’s financial metrics show significant strain. Oklo’s operating margin over the last twelve months is -18003.6%, compared to a median of 23.1% among S&P 500 Utilities stocks. The company also has negative trailing earnings, meaning it does not have a meaningful price-to-earnings multiple.
This move appears to be specific to the stock. Over the same 6 trading days, the S&P 500 returned -1.6%, a much smaller decline. The sources reviewed for this note do not show why the recent move happened.
A streak is information, not an instruction.
A streak of this length is a clear signal of momentum and concentrated investor attention. It is not, by itself, a reason to act. The disciplined response is to use the moment to re-evaluate the business against its new, lower price.
The numbers here provide a starting point for that work. A stock’s price is what you pay, but the business’s long-term performance is what you own.
A slide like this poses an obvious follow-up: which marked-down stocks are actually worth buying? Our Buy the Dip screen runs that test every day, flagging beaten-down names whose fundamentals still hold up.
Prefer the theme to this single name? A utilities ETF like XLU holds the whole group, not the single stock. It is still a concentrated bet on that one theme, though, which is exactly the gap the portfolio below closes.
A Slide Like This Is Why Diversification Exists
Watching one stock fall day after day is the clearest lesson the market teaches about single-name risk. Whether this particular decline is an opportunity or a warning, the deeper point is the same: no one name should be able to do this to your portfolio.
The Trefis High Quality (HQ) Portfolio is built on that principle: roughly 30 businesses selected for consistent cash generation, strong margins, and resilient balance sheets, sized and rebalanced with rules. It has a track record of outpacing a benchmark that combines the three major indices – the S&P 500, S&P Mid-cap, and Russell 2000. Study the slide; spread the risk.