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Bitcoin miners got crushed Wednesday. TeraWulf, Core Scientific, Cipher Mining, IREN — all down more than 12% in a single session, dragged lower by inflation numbers that nobody wanted to see and a broader market selloff that hit tech and AI infrastructure stocks hard.
Why It Matters
The significant decline in Bitcoin miners amid broader market turbulence underscores the heightened sensitivity of crypto assets to macroeconomic factors, particularly inflation data. As traditional tech and infrastructure stocks face selloffs, the interconnectedness of these markets may signal a reevaluation of risk appetite among investors, which could have lasting implications for the future of cryptocurrency valuations and mining operations. This reaction highlights the ongoing challenges that miners face, including rising operational costs and market volatility, which may further strain their financial health in an already competitive landscape.
It wasn’t just the miners. The S&P 500 dropped 1.1%, its worst single-day fall since late July. The Nasdaq Composite shed 1.9%. The Dow slipped 0.1%. And across the AI infrastructure space, 21 out of 23 tracked stocks closed in the red, averaging a 7.46% loss on the day. CoreWeave fell 16%. Nebius dropped 11%. Oracle lost 9%. Pretty much everything in the sector took a hit, and the miners — many of which have spent the past couple of years pivoting hard into AI infrastructure — got caught in the same wave.
The Inflation Numbers That Started It All
US consumer prices rose 3.7% year-over-year in September. Economists had penciled in 3.6%. Not a massive miss, but enough to rattle markets that had been hoping inflation was finally cooling toward the Federal Reserve’s 2% target. Part of the upside surprise came from gasoline prices, which climbed partly because of tensions in the Middle East feeding through to energy costs.
The reaction was fast. Implied probabilities of a Federal Reserve rate hike in October briefly shot past 50%, which is the kind of number that makes debt-heavy companies very nervous, very quickly. San Francisco Federal Reserve President Mary Daly did push back a bit — she said further hikes might still be necessary but there’s no immediate rush, and the Fed has time to look at more data before deciding anything. That helped calm things slightly. But it didn’t stop the bleeding on Wednesday.
Why Miners Feel Rate Hikes So Sharply
TeraWulf’s stock fell 12.64%. Core Scientific dropped 12.44%. Cipher Mining was down 12.35%, and IREN slid 12.2%. Riot Platforms and Bitdeer Technologies also posted notable declines, though the source didn’t break out exact percentages for those two.
The reason miners are so sensitive to interest rate news is basically this: a big chunk of the sector has been borrowing heavily to build out data centers and AI infrastructure. That’s expensive. When rates go up, the cost of that debt goes up too, and the financial math on those expansion plans starts looking a lot shakier. Investors know it, so they sell first and ask questions later.
It’s not a new vulnerability. Miners started diversifying into AI and high-performance computing a while back, chasing the revenue streams that straight Bitcoin mining can’t always guarantee, especially after halving events compress margins. But that diversification came with a catch — it tied them more tightly to the same interest-rate dynamics that govern any capital-intensive tech business. So when inflation data comes in hot and rate-hike talk picks up, miners don’t just get hit as crypto plays. They get hit as AI infrastructure plays too. Double exposure.
Debt, Expansion, and a Rough Spot
The broader selloff across AI infrastructure stocks kind of laid that out plainly. Twenty-one of twenty-three tracked names fell. Average decline, 7.46%. That’s not a minor wobble — that’s a sector-wide repricing of risk based on what higher borrowing costs could mean for companies still in aggressive build-out mode.
And it’s not like these companies have a lot of room to maneuver. Data center expansion requires capital. Lots of it. You can’t really pause a construction project halfway through and call it a strategy. So firms stay exposed, debt stays on the books, and when the Fed signals it might not be done hiking, the market responds accordingly.
Mary Daly’s comments were probably the most reassuring thing to come out of Wednesday. She didn’t rule out hikes but didn’t push for urgency either. The Fed, per her read, wants more data. That’s not a green light for rate cuts, but it’s also not a red alert. Markets are probably going to stay jittery until there’s more clarity on where consumer prices are actually heading.
Gasoline prices driven by Middle Eastern tensions aren’t exactly the kind of inflation the Fed can control with rate hikes, which makes the whole situation murkier. Raise rates to fight inflation you can’t really fix with rates — and you end up hurting the companies borrowing to build the infrastructure everyone says the country needs.
The average loss across those 21 AI infrastructure stocks on Wednesday was 7.46%.
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Frequently Asked Questions
Which Bitcoin mining stocks fell the most on Wednesday?
TeraWulf led declines at 12.64%, followed by Core Scientific at 12.44%, Cipher Mining at 12.35%, and IREN at 12.2%. Riot Platforms and Bitdeer Technologies also saw notable losses.
What inflation figure triggered the market selloff?
US consumer prices rose 3.7% year-over-year in September, slightly above the expected 3.6% and well above the Federal Reserve’s 2% target, sparking fears of another interest rate hike.
