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The S&P 500 closed at its first record since August and the Nasdaq notched a second straight record Tuesday, as investors decided the AI trade runs on megawatts as much as megachips. Nuclear stocks led the broadest rally in months on Google’s 20-year atomic power deal and a $4.2 billion Energy Department loan to Vistra. Behind the celebration: the EIA sharply raised its oil outlook on draining stockpiles, Micron paid $600 million to end a patent war over AI memory, and a small biotech’s vaccine upset rattled Merck and Pfizer.

Records Fall as Nuclear Stocks Power the AI Broadening

The S&P 500 rose 0.6% to 7,819.04, its first closing record since August and its 28th of 2026. The Nasdaq added 0.5% for a second consecutive record close, while the Dow climbed 253 points (0.5%).

The leaders were not the usual chip names. Utilities jumped roughly 3% — the sector’s best day in more than five months — as investors bet on the power plants feeding AI data centers. Constellation Energy surged 12% to $300.40 after Alphabet’s Google agreed to a 20-year deal to buy 890 megawatts of nuclear power and fund new capacity on the PJM grid. Vistra jumped 11% to $160.50 after the Energy Department confirmed a conditional loan of up to $4.2 billion, and NRG Energy rose 7%.

• Software stocks hit a 2026 high (+1%): Marvell +6%, Cisco +4.5%.
• Nvidia set its third straight intraday record and closed up 0.1%, within reach of a $6 trillion market cap.
• Seagate slumped 14%, the session’s notable decliner.
• The 10-year eased ~3 bps to 5.27-5.28% after Monday’s 24-year high above 5.35%; the $58 billion 3-year auction cleared smoothly at the highest yield since 2006.
• Record August imports pushed the trade deficit to $105.6 billion, the widest in 17 months; the Atlanta Fed trimmed its Q3 GDPNow estimate to 3.7%.
• Gold +0.75% to $4,159.20, snapping a two-session losing streak; silver +0.5% to $61.17.

Why it matters: the leadership rotation is the story. Investors are now paying for AI’s physical bottlenecks — power and memory — rather than just the chips. Hyperscaler power deals and federal loans de-risk utility capex, turning steady power producers into growth exposure. The risk is duration: utilities live and die on rates, and with the 10-year still above 5%, this trade has no margin for a hawkish surprise. Related reading: Market News Roundup — Oct 06: Ukraine Drone Blitz, AMD 2027 Supply Push

EIA Sharply Raises Oil Forecasts as Diesel Crunch Bites

The U.S. Energy Information Administration raised its oil price forecast Tuesday, warning global stockpiles are falling fast and diesel markets remain tight amid the Iran war. Brent is now expected to average $105 a barrel in the fourth quarter — $14 above the agency’s prior estimate — and $98 for all of 2026, up 8%.

• U.S. retail diesel, which hit record highs last month, is expected to stay above $6 a gallon through October before easing to about $4.50 on average in 2027.
• The 2027 Brent average forecast: $84 a barrel, $10 above the prior estimate.
• Gulf oil flows excluding Iran recovered to more than 81% of pre-war levels in September; regional shut-in production was the lowest since hostilities began.
• Close: Brent edged up to about $101, WTI +0.4% to $89.80 — still up over 37% since the war began February 28.

Why it matters: diesel is the inflation transmission belt for trucking, farming and freight — and President Trump signed an executive order Tuesday temporarily allowing red-dyed diesel in road vehicles to ease costs ahead of the midterms. The EIA’s message is “tight now, relief in 2027,” which keeps the Fed cautious and puts Jeremy Siegel’s $90 WTI ceiling for the equity rally in direct tension with a $105 fourth-quarter Brent call. Related reading: Market News Roundup — Oct 05: Nasdaq Record, 24-Year Yield Highs

Micron Pays $600 Million to End Netlist Patent War

Micron agreed to pay Netlist $600 million to settle a patent dispute over its memory chips — $30 million per quarter over five years for a license to Netlist’s portfolio, including its high-bandwidth memory technology. The deal follows Netlist’s $445 million infringement verdict against Micron in a Marshall, Texas federal court in 2024.

The settlement defuses a live threat: Netlist filed a complaint at the U.S. International Trade Commission in September seeking to block imports of Micron chips used in Google, Nvidia and Broadcom products for AI computing. Netlist CEO C.K. Hong said the agreement “further validates the value of our AI memory technologies.” Mizuho also reiterated its Outperform rating and $1,400 target on Micron, projecting agentic AI will drive server CPU revenues sharply higher into 2028.

Why it matters: an ITC import ban hanging over chips inside Google, Nvidia and Broadcom AI systems is gone — a direct de-risking of the AI supply chain. It also prices high-bandwidth-memory IP: $600 million says memory patents are now strategic assets, and Micron’s HBM roadmap was worth defending at that cost.

Vaxcyte’s Phase-3 Win Upends the Vaccine Duopoly

Vaxcyte shares surged 57% Monday to a 52-week high of $90.75 after its 31-valent pneumococcal vaccine VAX-31 met every primary endpoint in the 4,047-adult OPUS-1 trial. The candidate matched immune responses from Pfizer’s Prevnar 20 on all 20 shared strains and from Merck’s Capvaxive on 17 of 19, with comparable safety.

• Jefferies called the results a “blue-sky” case, pointing to a $3 billion to $6 billion-plus adult market; Needham raised its price target to $122.
• Vaxcyte plans a U.S. marketing application in the first half of 2028, with two more Phase-3 readouts due in early 2027.
• The counterweight: Vaxcyte priced $500 million in stock plus $500 million in convertible notes — dilution that pressured the shares — and put-option activity spiked Tuesday.
• Merck fell 3.3% and Pfizer 1.4% on Monday; healthcare was the only S&P 500 sector to fall Tuesday.

Why it matters: pneumococcal vaccines are a multibillion-dollar duopoly about to gain a broader-coverage third player. The read-through for big-pharma investors: biotech Phase-3 readouts now move mega-cap stocks, and vaccine incumbents’ pricing power has an expiry date measured in years, not decades.

M&A Tuesday: Uber, Energy Transfer, McKesson/CD&R Strike Deals

Dealmaking ran hot alongside the rally. Uber agreed to buy catering platform EzCater for about $2.3 billion in cash, pushing its food-delivery business into corporate catering. Oil and gas pipeline operator Energy Transfer agreed to buy Vaquero Midstream for about $2.63 billion in cash and stock.

In healthcare, investment firm CD&R and drug wholesaler McKesson agreed to buy home-infusion provider Option Care Health for about $5.8 billion including debt. Becton Dickinson struck a deal with the Trump administration to invest $19 billion in the U.S. in exchange for relief from future tariffs — while SoftBank-backed DayOne Data Centers moved to raise up to $5 billion in a U.S. IPO.

Why it matters: multi-billion-dollar checks written into an uncertain macro are a confidence indicator. The Becton Dickinson template — capex commitments in exchange for tariff relief — may become a playbook for other importers. And DayOne’s IPO filing shows AI infrastructure financing migrating from private credit to public markets.

Sources

• WSJ: Stock Market Today live coverage (Oct 6)
• WSJ: U.S. Stocks Rise as AI Momentum Builds
• Barron’s: The Utilities Sector Goes Nuclear
• Barron’s: S&P 500 Breaks Out to Record High
• Investopedia: S&P 500, Nasdaq Close at Fresh Records
• MarketWatch: Google’s Nuclear-Power Deal with Constellation
• Investor’s Business Daily: Vistra, Constellation, NRG Rally
• Reuters: Trading Day — Global Markets
• Reuters: US EIA Hikes Oil Price Forecasts
• Reuters: Micron Enters $600M Netlist Settlement
• Seeking Alpha/Mizuho: Agentic AI Drives Up CPU Demand
• Fierce Biotech: Vaxcyte’s Pneumococcal Shot
• Jefferies via TradingView: Vaxcyte ‘Blue-Sky’ Case
• OilPrice.com: Saudi Arabia’s Oil Export Recovery
• WSJ: Gold Futures Regain Ground

The AI trade went nuclear today — literally. Are power producers like Constellation and Vistra the smarter way to play AI from here, or do the chip stocks still hold the real upside? Share your take in the comments.

Auto-posted by the Bull Lounge news desk.

Not financial advice.

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