Stock Market Today: Nasdaq Plunges 1.9% as Hot CPI Revives Rate-Hike Bets; Dow Holds Up on Defensive Rotation

New York, Oct. 15, 2026 — U.S. stocks closed sharply lower on Wednesday, with the Nasdaq Composite tumbling nearly 2% after a hotter-than-expected September inflation report revived fears that the Federal Reserve will need to raise interest rates again, triggering a broad selloff in technology and AI-linked shares.

The Dow Jones Industrial Average fell just 48.62 points, or 0.09%, to close at 51,621.48, cushioned by a rotation into healthcare and consumer staples names . The S&P 500 dropped 86.51 points, or 1.11%, to 7,718.94 — its first decline of at least 1% in more than 50 trading days . The tech-heavy Nasdaq Composite plunged 511.51 points, or 1.88%, to 26,692.87 .

Why Did the Stock Market Fall Today?

The catalyst was the September Consumer Price Index (CPI) report, which showed inflation accelerating more than economists expected.

Headline CPI rose 0.6% month-over-month — the fastest pace since April — and 3.7% year-over-year, exceeding the 3.6% consensus estimate . Core CPI, which strips out volatile food and energy prices, increased 0.3% monthly and 2.6% annually, both one-tenth of a percentage point above forecasts .

A 9.1% surge in gasoline prices accounted for more than half of the monthly increase, driven by the ongoing U.S.-Israeli conflict with Iran . But the report also showed price pressures broadening beyond energy: airline fares rose 1.2%, used vehicles gained 0.7%, and services prices advanced 0.4% .

“This makes it very likely the Fed will act in December,” said Phillip Blancato, chief market strategist at Osaic, noting that considering higher oil prices, “we expect core CPI could be 3% next year” .

Why Did the Nasdaq Suffer Most?

The rate-sensitive technology sector bore the brunt of the selling. The Philadelphia Semiconductor Index tumbled 4.3%, extending its losing streak to six consecutive sessions and bringing its cumulative decline to nearly 12% . The index has shed approximately $1.6 trillion in market value over that stretch .

AI-linked names were hit hardest: CoreWeave plummeted more than 15%, Oracle dropped nearly 9%, and Micron Technology fell 4% . Advanced Micro Devices and SanDisk each declined over 5% .

The selloff reflected growing unease about the debt-fueled AI infrastructure boom. Investors are increasingly questioning whether the massive capital expenditures driving the AI trade can generate sufficient returns, especially as borrowing costs remain elevated .

Which Sectors and Stocks Held Up?

Healthcare and consumer staples were the only S&P 500 sectors to post meaningful gains, rising 2.44% and 2.38% respectively, as investors rotated toward defensive positioning . UnitedHealth and Amgen helped limit the Dow’s decline .

Energy edged up 0.8% as West Texas Intermediate crude settled at $95.09 per barrel**, up 1.01%, while **Brent** closed at **$106.06 .

On the downside, Bank of America tumbled 4.76% after its quarterly revenue missed expectations — even excluding a $1.2 billion regulatory fine related to its failure to report suspicious transactions . Morgan Stanley fell nearly 3% despite beating estimates .

What Are Treasury Yields and the VIX Saying?

The bond market experienced significant volatility. The 10-year Treasury yield initially spiked above 5.32% following the CPI release but later reversed sharply, falling 14 basis points to 5.05% as investors fled to safe-haven assets amid the equity selloff .

The CBOE Volatility Index (VIX) — Wall Street’s “fear gauge” — jumped 10.5% to 16.87, its highest level in two weeks .

What Economic Data Was Released Today?

The Labor Department reported that initial jobless claims rose by just 1,000 to 199,000 for the week ending October 10, below the 200,000 consensus estimate . Continuing claims fell by 4,000 to 1.71 million, remaining near a more-than-three-year low .

The resilient labor market data, combined with the hot inflation reading, reinforced expectations that the Fed can afford to maintain restrictive policy.

What’s Next for Investors?

According to CME FedWatch, traders now price a 37% probability of a 25-basis-point rate hike at the Fed’s October 27-28 meeting, up sharply from 22% before the CPI release . The odds of at least one hike by December have risen to approximately 91% .

Fed Vice Chair for Supervision Michelle Bowman said the central bank could afford to wait and assess economic developments before deciding on further action, signaling a cautious approach .

Meanwhile, Goldman Sachs maintained its “overweight” rating on global equities, recommending a “barbell strategy” that pairs technology stocks with rate-sensitive names that have seen valuations compress .

The S&P 500 remains just 1.3% below its record high set last week, suggesting the pullback has not fundamentally altered the market’s underlying strength .

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Key Takeaways (Quick Summary)

• Nasdaq plunged 1.88% to 26,692.87; S&P 500 fell 1.11%; Dow slipped just 0.09%.
• September CPI came in hot: 3.7% annual headline, 2.6% core, both above estimates.
• Rate-hike odds surged to 37% for October, 91% by December.
• Semiconductor index fell 4.3% for a sixth straight session, down 12% cumulative.
• CoreWeave crashed 15%, Oracle dropped 9% as AI-debt concerns mounted.
• 10-year Treasury yield whipsawed from 5.32% to 5.05% as investors sought safety.
• VIX jumped 10.5% to 16.87, a two-week high.
• Jobless claims stayed low at 199,000, reinforcing labor market resilience.
• Healthcare and staples were the only sectors to gain as defensive rotation kicked in.