A month ago, everyone was still shouting "AI will change the world."
Now, the Philadelphia Semiconductor Index has fallen for seven consecutive days, wiping out $2 trillion in market value.
Even more outrageous—Nvidia, the chip seller, has to step in to guarantee that chip buyers won't default.
This signal is scarier than the crash itself.
The Philadelphia Semiconductor Index has declined for the seventh consecutive trading day, erasing over $2 trillion in market value. Compared to the historical high in June, the drop exceeds 20%, officially entering a technical bear market.
Intel fell 2.80%, Nvidia dropped 1.84%. AMD and Intel even plunged 7% intraday.
South Korea's KOSPI index plunged 7%, SK Hynix fell 11%, Samsung Electronics dropped 9%.
This is not a normal correction. This is capital voting with its feet.
So the question arises—Is AI demand faltering?
Nvidia's latest quarterly data center revenue is $89 billion, and TSMC's Q3 profit grew 69% year-over-year. The fundamentals are not bad.
Then why is it still falling?
Because the market has finally started looking at another sheet—the balance sheet.
CoreWeave, Nvidia's "favorite child," is a company specializing in AI cloud computing power. Its five-year CDS spread soared to 1194.5 basis points, a record high. The implied five-year default probability exceeds 60%.
CDS is bond default insurance. If you buy insurance on a company's bonds and the premium is outrageously high, it means the market believes it is very likely the company won't be able to repay.
What does a 60% default probability mean? Investment-grade companies are usually below 1%. CCC-rated junk bonds are only about 20%-30%.
CoreWeave's bond yields have already surged to 15.6%-16.2%. Bonds with a coupon rate of 9.625% are trading at 78 cents on the dollar in the secondary market.
Even Elon Musk, seeing this number, replied with just one word: "Yikes."
Jensen Huang stepped in to "put out the fire."
He said publicly: "CoreWeave's strength is improving every day, financing costs are actually decreasing, and Nvidia does not need to intervene to rescue."
Did the market buy it? Not at all.
Oracle's CDS spread rose to nearly 300 basis points. SoftBank and Nvidia's own CDS also rose simultaneously.
When the shovel seller has to guarantee that the shovel buyer won't default—this model's fragility is already written in the CDS pricing.
Nvidia invests in CoreWeave → CoreWeave borrows money to buy Nvidia GPUs → Nvidia recognizes revenue → Nvidia's stock price rises → then uses the increased stock price to invest in more computing power companies.
This is a perfect closed loop. As long as borrowing costs are low enough, it can keep spinning.
But now borrowing costs have soared above 15%, and this loop is breaking. CoreWeave's debt exceeded $30 billion at the end of Q2, with free cash flow negative $27 billion in 2026.
It's not that it's unprofitable, but the money it earns is far from enough to cover expenses.
Bitcoin, on the other hand, has become the most resilient.
On October 16, Bitcoin rebounded from an intraday low of $79,789 to $82,331, holding above the $80,000 mark. The total crypto market cap is about $2.78 trillion, up slightly 0.76% in 24 hours.
Interestingly, as AI faith begins to collapse, capital is flowing back to the "oldest" crypto asset.
This may indicate a harsh reality: the market is shifting from "storytelling" to "cash flow."
The Philadelphia Semiconductor Index has fallen seven days straight, evaporating $2 trillion. CoreWeave's default probability exceeds 60%, bond yields approach 16%.
This is not a simple sector rotation. This is the turning point where AI investment logic shifts from "computing power faith" to "debt scrutiny."
In the past two years, the market only looked at GPU shipments and data center construction speed. Now, the market is asking a more fundamental question: Will this money be repaid?
When the GPU seller has to guarantee that the GPU buyer won't default—
The fragility of this model is already written in the CDS pricing.
$NVDA$AMD$BTC
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