Wall Street rallies as oil slide cools inflation fears while Nvidia slumps

A relief rally built on cheaper oil; and one spectacular exception

Wall Street came back swinging on Monday 9 November 2026. The Dow Jones Industrial Average jumped 2.15 percent to close at 52,389.75, the S&P 500 rose 2.35 percent to 7,549.94, and the Nasdaq Composite gained 2.74 percent to 25,253.14, as a sharp slide in crude oil cooled inflation fears and technology shares rebounded from their worst week since April 2025.

The rally was broad: all 11 major S&P 500 sector indexes rose, with industrials and consumer discretionary leading at about 4 percent each, and the S&P recorded its strongest single session since 8 April. The Philadelphia Semiconductor Index shot up about 7 percent after plunging more than 12 percent last week. Almost every chipmaker joined the recovery; except Nvidia, the world’s second most valuable company, closed down 4.3 percent at $178.67 after falling more than 8 percent at the open, as investors weighed a board investigation into chief executive Jensen Huang. Last week’s chip sell-off had dragged global stocks lower; Monday’s rebound was the mirror image; except at Nvidia.

What the closing prices, the oil market and the boardroom confirmed

The closing prints leave little doubt. The Dow added 1,104 points, the S&P posted 13 new 52-week highs against three new lows, and the Nasdaq recorded 73 new highs. Every sector rose, and two weeks of selling, driven by doubts over the artificial-intelligence trade, gave way to buying across the board.

Oil did much of the work. Brent crude fell 5.85 percent to $92.57 a barrel and the US benchmark West Texas Intermediate dropped 4.38 percent to $86.85, after President Donald Trump played down the likelihood of renewed strikes on Iran. Brent had traded above $112 at the start of November and lost nearly 17 percent the previous week; Monday’s slide extended the retreat and took pressure off the inflation outlook, even as the Strait of Hormuz stayed tense; two tankers caught fire there after hitting mines.

Nvidia’s fall had a cause of its own. The company’s board announced on Sunday that it had opened an independent investigation into whether Huang had been targeted by a foreign intelligence effort, run by a committee of independent directors with outside counsel. Huang told employees he had been unfaithful to his wife, while insisting no company secrets were compromised, and he remains chief executive; the board said it had no reason to believe national security or Nvidia secrets were compromised. The probe follows an October report in The New York Times about Huang’s relationship with Alice Huang, a former executive at Singapore-based Megaspeed whom US authorities concluded was a Chinese intelligence asset; China has rejected the claims as baseless. Trump called Huang “honorable” even as the probe opened.

What is still missing from the Nvidia picture; and from the rally itself?

The investigation’s outcome is unknown: what, if anything, was passed on, whether Huang’s position survives it, and what the independent directors will conclude. The House chairmen who want Huang briefed on 18 November will ask the same questions, a day after Nvidia reports quarterly results.

The rally’s durability is unproven too. It is not yet clear whether oil’s slide reflects a lasting de-escalation with Iran or a temporary unwind of the war premium, nor whether Tuesday’s inflation report will confirm that price pressures are cooling. And nobody knows what form Democratic regulation of artificial intelligence might take; the question that triggered last week’s sell-off in the first place.

Why a one-day bounce carries the whole AI trade on its back

The artificial-intelligence trade is the market’s engine, and last week showed how quickly politics can reprice it: a sweeping Democratic victory in the midterm elections fed fears that new regulation could dent the durability of AI spending, and the S&P suffered its worst week since April 2025. Morgan Stanley and UBS both called the rout overdone, arguing that the risk of extreme regulation of data-centre development was low even with Democratic majorities in Congress; and Monday’s buying agreed with them, for now. Whether the Democrats can deliver on their promises is now a market question as much as a political one.

The second reason is the Federal Reserve. Markets still price a December rate rise at above 80 percent, according to CME FedWatch, after a strong October jobs report gave the central bank room to keep tightening. Cheaper oil eases that tension: if fuel costs fall, the inflation readings due this week, consumer prices on Tuesday, producer prices on Friday, have a better chance of coming in cool. Richmond Fed President Tom Barkin said on Monday that the Fed should move “with care” as it maps its response to inflation.

The third is Nvidia itself. A $4.5 trillion company, the world’s second most valuable, does not fall 4 percent on a day when everything else rises without dragging the indices, the chip sector and the AI story with it. The probe has put a governance discount on the market’s most important stock.

How geopolitics, oil and the AI trade collided on a single Monday

Read through the five dimensions, Monday was a collision of three separate stories. Geopolitically, the day turned on Iran: the president’s signal that renewed strikes were unlikely pulled the war premium out of oil, and with it some of the inflation fear that has shadowed markets for weeks. At the same time, the US-China espionage friction landed squarely on Nvidia, through a Singapore-based company and a chief executive whose personal life became a national-security question.

Economically, oil is the fastest channel from geopolitics to inflation expectations: a near-6 percent fall in Brent does more for the price outlook than a month of speeches. That is why the rally was broad; cheaper fuel lifts consumers, transport, manufacturers and retailers at once.

Demographically, the cost of living is the thread that ties the market to the ballot box: it decided the 2026 midterms, and it is the pressure voters punished last week. The cost of living decided the midterms, and it is still setting the terms of the recovery.

Historically, the echoes are from April 2025; the S&P’s worst week since then, followed by its strongest session since 8 April. Markets have bounced hard from sell-offs before and failed; the test is not the bounce but the follow-through.

Structurally, the question is the durability of the AI build-out: the data centres, the chips, the power. Monday’s semiconductor surge, all but Nvidia, says investors still believe in it; Nvidia’s fall says they now price governance risk alongside it. “The AI story is not going away,” market veteran Ken Polcari told Reuters. “The Democrats are not going to destroy AI. They can’t. It’s got a life of its own.”

What happens if the inflation data breaks the rally’s logic?

First, Tuesday’s consumer-price report is the hinge. A cool reading would confirm the story Monday told, that cheaper oil is taking pressure off prices, and extend the relief trade. A hot reading would do the opposite: harden the case for a December rate rise that markets already price above 80 percent, and hand the sellers their argument back.

Second, Nvidia’s calendar is now a market event in itself. Quarterly results on 17 November arrive with the chief executive under investigation and a House briefing the next day, and Aletheia Capital has already cut the stock to hold and removed its $340 target. Further downgrades would widen the governance discount across the AI leaders.

Third, oil’s slide cuts both ways. Importers gain; producers lose; and the Strait of Hormuz remains a live risk. If the de-escalation with Iran reverses, the war premium returns as fast as it left.

Fourth, the Democrats’ regulatory posture is now a market variable. Whatever rules emerge for data centres and AI development will be priced the moment they are proposed; and Monday showed how fast that pricing can be.

What should traders watch next?

Watch Tuesday first: the Labor Department releases October’s consumer-price index at 8:30 a.m. Eastern, and producer prices follow on Friday. Watch Nvidia next: results on 17 November, then Huang’s briefing to House chairmen on 18 November. Watch the Federal Reserve’s December meeting, where a rate rise is priced above 80 percent.

And watch the tape itself: whether Brent holds below $93, whether the breadth, all 11 S&P sectors rising together, survives into Tuesday, and whether Nvidia’s fall stays a single-stock story or spreads to the chipmakers that rallied without it.