Nasdaq-100 Posts Best Day Since March While Nvidia Falls 4.27%

The Nasdaq-100 rose 917.64 points, or 3.40%, to 27,907.63 on November 9, 2026 — its best session since March 31 — and Nvidia was the index's worst performer on the same day. The chipmaker lost 4.27%, or $7.97, to close at $178.67, its lowest close since April 7 and the worst result among all 101 index members.

The Invesco QQQ Trust (NASDAQ: QQQ), the exchange-traded fund that tracks the index, closed at $679.35, up 3.54%. That was the fund's best session since May 12, 2025. The split matters for a simple reason: Nvidia still carries roughly a 7.1% weight in the index, second only to Apple at about 8.5%.

How Much Did Nvidia Drag on the Rally?

A rough estimate multiplying Nvidia's index weight by its move puts its drag at about 0.3 percentage points. The index still posted a strong gain because breadth carried the day: 86 members rose and only 15 fell.

The takeaway in plain words: one heavily weighted stock can fall hard, and a diversified index can still rally when the other 100 members cooperate.

Chip Stocks Carried the Index Without Its Biggest Chipmaker

The Philadelphia Semiconductor Index (SOX, the benchmark for chip stocks) rose 6.85% to 10,033.93. That rebound came after the index lost more than 12% in the week ended November 6. Nvidia was the only stock in that chip index to fall on November 9.

Several names drove the move:

• Monolithic Power Systems (NASDAQ: MPWR) gained 16.6%
• Applied Materials (NASDAQ: AMAT) rose 11.37%
• Apple (NASDAQ: AAPL) added 2.43%

Two other forces supported the rally, according to the reporting. Brent crude fell 5.85% to $92.57, easing inflation concerns. Short covering — traders buying back borrowed shares they had sold earlier — and value buying also contributed to the gains.

The takeaway: semiconductor investors bought the dip across the sector, with the notable exception of the sector's largest company.

What Did Nvidia Disclose — and What Did It Leave Out?

Nvidia's board opened an independent investigation into national security concerns about CEO Jensen Huang, prompted by news reports. Huang disclosed the review in a November 8 memo to employees and said he will cooperate fully. The board said it has no reason to believe national security or company secrets were compromised.

The memo is the only formal record so far, and that gap deserves attention. Nvidia's most recent 8-K filing (the SEC document for material company events) is its August 26 earnings filing. No press release on the investigation has appeared. Nothing filed publicly names who is conducting the review or when it will finish.

The business outlook, at least on paper, has not changed. Nvidia forecast fiscal third-quarter revenue of $108.0 billion, plus or minus 2%, and its market value stands at roughly $4.31 trillion.

The takeaway: an internal memo is not a regulatory filing, and until the investigation details reach the SEC record, investors are pricing a story with missing pages.

Why the Nasdaq-100 Remains in a Correction

The index sits 10.62% below its 31,224.47 record close of October 6, and 1.86% below its 28,437.17 close of November 4. That keeps it in correction territory, defined as a drop of 10% or more from a peak.

The broader Nasdaq Composite fared better on the day and in the drawdown. It rose 2.74% to 25,253.14 and now sits 8.50% below its record, which pulls it out of correction territory. The Nasdaq-100 remains up 10.53% for 2026 year to date.

The takeaway: one strong session repaired little of the damage from the past month; the index still needs a 10.6% climb to reclaim its high.

What Could Make or Break QQQ's Rebound?

For long-term holders, November 9 was a stress test that the fund's structure passed. The fund posted a big gain while its second-largest holding fell, which shows breadth matters more to a diversified owner than one company's governance review.

Concentration remains a real risk. Nvidia and Apple hold the two largest index weights, so if the Nvidia investigation surfaces a serious problem, QQQ holders would feel it directly.

The calendar now sets the tests:

• October CPI (consumer price index, the headline inflation gauge) lands November 10 at 8:30 a.m. ET. Economists expect 0.3% headline and 0.2% core inflation.
• Applied Materials reports earnings on November 12.
• Nvidia reports on November 17.

Two price levels frame the verdict. A Nasdaq-100 close above 28,437.17 after Nvidia's report would confirm the rebound. A close below 26,989.99 — the November 9 starting level — would mean November 9 was only a relief bounce, and the rebound case would be wrong.

The takeaway: the rally bought time, but Nvidia's November 17 report and the inflation data will decide whether the correction ends or resumes.