S&P 500 Clears 7,800 as AI Chips Outrun Yields

The S&P 500 closed at 7,818.93 on Tuesday, up 0.58 percent, and finished above 7,800 for the first time. The Nasdaq Composite added 0.45 percent to a record 27,599.79, and the Dow Jones Industrial Average rose 0.49 percent, or 253.38 points, to 51,521.28.

Chipmakers did the lifting after Marvell Technology’s investor day, and a one-day dip in Treasury yields from a 24-year high gave the tape room. The same session still had to live next to a 29,000-job month, diesel above $6, and a White House tax waiver aimed at truckers and farms.

The S&P 500’s First Finish Above 7,800

Tuesday was the S&P 500’s first record close since August 13 and its fourth straight gain. The Nasdaq, already at a high on Monday, printed a second one. The index is up 2.75 percent so far in October. The Dow remains just over 5 percent below its August closing peak.

Stephen Kolano, chief investment officer at Integrated Financial Partners, put the mood in one line. “Everyone’s like markets are up. AI is the place to be,” he said, with oil, diesel, and other costs pushed to the side for now.

Goldman Sachs analysts wrote last week that AI infrastructure stocks are expected to drive more than half of S&P 500 earnings-per-share growth in the third quarter, and that Nvidia and Micron are likely to account for a third of that total. Nvidia, the largest U.S. public company, moved closer to a $6 trillion market value on the same tape. Meta Platforms was the only Magnificent Seven name to finish lower, down 0.41 percent.

The advance was narrow in the way these sessions have been all year. Tech and AI did the work. Other sectors have spent recent weeks absorbing higher long-term yields, and nothing in Tuesday’s close repaired that split. The index and the household economy are not telling the same story, and they will have to meet.

Marvell Put a $90 Billion Target on the Table

Marvell held investor day in New York and raised the numbers that Wall Street uses to price custom AI silicon. Chairman and CEO Matt Murphy set the company’s first fiscal 2031 revenue range at $70 billion to $90 billion and lifted the fiscal 2028 goal to about $20 billion from $18 billion in August. Last fiscal year the company booked $8.2 billion. The $20 billion figure sits $1.8 billion above the $18.2 billion LSEG consensus.

The 2028 target has been a moving object. Less than a year ago it was about $13 billion.

MARVELL’S FISCAL 2028 REVENUE GOAL

1. December 2025: Sets a fiscal 2028 goal of about $13 billion.
2. March 2026: Lifts that goal to about $15 billion.
3. May 2026: Moves it again, to about $16.5 billion.
4. August 2026: Raises it to about $18 billion with second-quarter results.
5. October 6, 2026: Puts the goal at about $20 billion at investor day, the fifth raise in roughly a year.

Murphy had already told investors, in the August results, that AI bookings were strong and that custom work would accelerate in the second half of fiscal 2027. The company reported record second-quarter revenue of $2.739 billion, up 37 percent from a year earlier. Data-center sales were $2.17 billion, up 46 percent, and made up 79 percent of the quarter. Fiscal 2027 revenue is still expected at about $12 billion.

Street models had been far below the new 2031 range. Analyst consensus sat near $47 billion, and Piper Sandler had modeled about $45 billion. Even the bottom of Marvell’s band is more than 50 percent above that Piper figure. Marvell shares closed up 5.81 percent. Broadcom, which sells into the same custom-chip trade, advanced 3.7 percent.

CHIP AND POWER MOVERS, OCTOBER 6

AMD closed at $649.42. CEO Lisa Su, speaking to reporters in Taipei, said chip demand should stay very strong for the next few years and that the company plans to expand supply in 2027. Citigroup raised its price target to $800 from $575. Alphabet’s Google lined up 890 megawatts of nuclear power from Constellation Energy under a 20-year contract, and Constellation jumped 12.3 percent. The same buildout that is lifting chip stocks is now a power-purchase story.

The Payroll Print That Froze October

The other bid under the tape was policy. Traders used CME FedWatch to put an 80 percent chance on a hold at the October 27-28 meeting after the September jobs report landed far below forecasts.

The Bureau of Labor Statistics said employers added 29,000 jobs in September. Economists had expected 90,000. The unemployment rate rose to 4.2 percent from 4.1 percent, and labor-force participation moved up to 61.8 percent from 61.6 percent. Private payrolls rose 46,000. Government payrolls fell 17,000. A St. Louis Fed staff note said payroll growth slowed in September to 29,000 jobs, less than half the forecast, with July and August revised down by a combined 60,000.

THE SEPTEMBER JOBS PRINT

• Payrolls: Nonfarm employment rose 29,000 against a 90,000 consensus, after a 12-month average gain of 45,000.
• Revisions: August was cut from 162,000 to 133,000, and July was revised to a loss of 10,000.
• Pay: Average hourly earnings rose 5 cents to $37.81, leaving the 12-month gain at 3.0 percent.
• Household survey: Employment rose 406,000, but the labor force rose 485,000, and unemployment stood at 7.1 million.

On September 16 the Federal Open Market Committee raised the federal funds target range by a quarter point to 3.75 percent to 4 percent, on a 12-0 vote, the first increase since 2023. The statement said inflation remains elevated and that the move would support a quicker return to the 2 percent goal. The effective federal funds rate is 3.88 percent. Median projections from that meeting put the appropriate rate at 4.1 percent by year-end, which is one more quarter-point rise.

Comments from New York Fed President John Williams and Vice Chair Philip Jefferson, then the jobs miss, knocked October hike odds from about 65 percent to under 20 percent. Chair Kevin Warsh had sounded firm in September. The equity bid on Tuesday treated that sequence as permission to look through the long bond and stay in chips.

From a 24-Year High, the 10-Year Slips

The Federal Reserve’s H.15 release put the 10-year constant-maturity yield at 5.31 percent on Monday, October 5, a 24-year high and the most since April 2002. On Tuesday the yield last traded around 5.286 percent. The 30-year was near 5.659 percent after a Monday print not seen since May 2002. The 2-year was near 4.80 percent.

Monday’s spike followed the Institute for Supply Management’s services reading. The index came in at 54.9 in September, in line with forecasts but slower than August, while the prices index rose 1.4 points to 74. That mix, soft activity with hot paid prices, is what a long bond sells off on. Equities used the Tuesday dip anyway.

The bond market is sending a more important signal right now than the stock market. The Fed controls the short end, but it has far less control over the long end.

David Miller, chief investment officer, Catalyst Funds

A hold in October would cap the front end. It would not, by itself, pull a 5.31 percent 10-year back into a range that cheapens mortgages, corporate debt, or the discount rate on everything else. That is the split inside the record: chips can rally on a pause, and the long bond can still price inflation that has not gone home.

Households Are Still Paying $6 for Diesel

The Energy Information Administration’s weekly survey for October 5 put regular gasoline at a national average of $4.354 a gallon, down 11.1 cents on the week and up $1.230 from a year earlier. On-highway diesel averaged $6.199, down 18.3 cents on the week and up $2.488 from a year earlier. Diesel had printed $6.529 the week of September 21 and $6.382 the week of September 28. California regular was $6.227. California diesel was $8.082.

Those pump numbers are the part of the week that does not show up in a 7,818.93 close. Crude held near $100 a barrel. President Donald Trump signed an order on October 5 that will temporarily allow off-road dyed diesel on highways and defer the federal excise tax through year-end, without interest or penalties.

WHAT THE DIESEL ORDER DOES

• The waiver: Off-road red-dyed diesel may be used on the highway for the rest of the year, with the federal excise deferred.
• The claim: The White House says the step can save truckers more than $100 per refill.
• The agencies: Treasury handles the deferral, Transportation is to work with states and labor, and Agriculture is to keep farm supply available.
• The barrels: The fact sheet also cites a European release of 100 million barrels of refined diesel over the next four months.

Dyed diesel is the untaxed off-road grade used on farms, in construction, and for heat. Putting it on the highway is a stopgap, not a new refinery. Midterm ballots are weeks away, and fuel is the price most voters see every week. Chip-led records do not change that receipt.

Why the Dow Remains Short of Its August Peak

The Dow’s 0.49 percent gain left it more than 5 percent under its August closing record, even as the S&P 500 and Nasdaq made new highs. That gap is the breadth problem in one number. A 30-stock average with banks, industrials, and consumer names still feels the 10-year. A Nasdaq close at 27,599.79 does not.

Optical names moved with the chip tape. Astera Labs and MACOM were among the stronger semiconductor-index stocks, and Corning gained about 6 percent with the AI-connect trade. Those are still the same theme, not a rotation into the rest of the market. Third-quarter earnings start in earnest next week, and that is the first test of whether the 7,800 close was paid for with profits or with multiples.

Opening Earnings Season Under a Record

Minutes from the September 15-16 meeting are due at 2 p.m. Eastern on October 7. They will show whether the unanimous hike hid a split on a second move. A hawkish read could send the 10-year back toward Monday’s 5.31 percent. A patient read would feed the same chip bid that carried Tuesday.

Marvell delivered record second-quarter fiscal 2027 revenue of $2.739 billion, up 37% year over year, driven by continued strong demand across our Data Center portfolio, where revenue growth accelerated to 46% year over year.

Matt Murphy, chairman and CEO, Marvell Technology, August 27 results

That sentence is what Tuesday’s buyers were still underwriting two months later, now with a $70 billion to $90 billion 2031 card on the table. The October 27-28 meeting remains the next policy date. Until then the S&P 500 can sit at 7,818.93, diesel can sit at $6.199, and both can be true at once.

Disclaimer: This article is news reporting and market analysis for information only. It is not investment, tax, or trading advice, and it is not a recommendation to buy or sell any index, stock, bond, or fund named above. Readers should consult a licensed financial adviser or tax professional who can weigh their own holdings, time horizon, and risk before acting on any figure in this piece. Index levels, yields, payroll counts, and fuel prices are those published by the sources cited as of October 6 and October 7, 2026, and they can move in the next session.