Stock Market Today: Anthropic's IPO Filing Lifts Chip Stocks as Brazil Crashes
The S&P 500 rose 0.70% and chip stocks 2.82% after Anthropic's IPO filing revived the AI trade, while Brazil's main index had its worst day since March 2020.
Stocks bounced on Monday after Anthropic, the company behind the Claude chatbot, made its IPO filing public and showed investors how fast its sales are growing. The S&P 500 rose 0.70% to 7,676.77 and the Nasdaq Composite gained 0.82%, led by chipmakers. Brazil went the other way: its main index fell 13.88% after President Luiz Inácio Lula da Silva won Sunday’s runoff.
Anthropic’s books revived the AI trade
Anthropic’s prospectus shows $16.3 billion of revenue in the first half of 2026, against $4.6 billion for all of 2025. It plans to list on the Nasdaq under the ticker ANT, but the price range and the size of the raise are still blank, CNBC and Fortune reported. The S&P 500 and the Nasdaq had just had two losing weeks on worries about AI spending, and CNBC and Yahoo Finance tied Monday’s bounce to the filing.
The PHLX Semiconductor index, which tracks the biggest chip companies, rose 2.82%, its best day since 21 September by our count. Arm (ARM) jumped 6.2%, Nvidia (NVDA) rose 2.4% and Broadcom (AVGO) 2.3%. Lumentum (LITE), which makes optical parts for AI data centers, soared 8.2%, the best performer in the S&P 500, after StoneX started covering it with a Buy rating, Benzinga reported.
“The market needed this, just like it needed SpaceX,” Jay Woods, chief market strategist at Freedom Capital Markets, told CNBC.
Brazil’s election bet unwound in a day
Lula beat Senator Flávio Bolsonaro 51.8% to 48.2%, and investors who had bet on a Bolsonaro win sold. Brazil’s Bovespa fell 13.88%, its worst day since March 2020, and a 10% drop set off a 30-minute trading halt, Reuters reported. The real ended about 8% weaker against the dollar.
In New York, Nu Holdings (NU) plunged 17.0% and MercadoLibre (MELI) slid 7.8%. Our story on the selloff has the details.
Fair Isaac, DoorDash and Tesla
Fair Isaac (FICO) plunged 13.2%, the worst performer in the S&P 500, after Wells Fargo downgraded it over its decision to hold the price of its mortgage credit score. Full story. DoorDash (DASH) slid 6.1% after The Wall Street Journal reported it is in advanced talks to buy Instacart; Reuters put the price at about $17 billion. Full story.
Tesla (TSLA) jumped 5.2% after Barclays analyst Dan Levy upgraded it to Overweight and raised his price target to $450, from $370, citing among other things a possible combination with SpaceX, Yahoo Finance and TradingKey reported. No deal has been announced.
Meta’s share sale and a calmer oil market
Meta Platforms (META) fell 1.9% after it said it plans to raise up to $95 billion by selling new shares to pay for its AI build-out, starting with about $35 billion now, CNBC and Yahoo Finance reported. Nvidia, AMD and Broadcom, which sell Meta its chips, said they are interested in buying up to $5 billion of the shares. Communication services, Meta’s sector, was the worst of the 11, down 1.42%.
Oil eased after Saudi Arabia’s defense minister, Prince Khalid bin Salman, met Iranian President Masoud Pezeshkian in Tehran, CNBC and Rigzone reported. December Brent settled at $115.81 a barrel, down 0.8%, and US crude fell 1.46%. The attacks have not stopped: Yemen’s Houthis said they fired missiles at Riyadh’s airport, which Saudi Arabia has not confirmed, and the Saudi-led coalition said it intercepted missiles.
The Federal Reserve announces its rate decision on Wednesday at 2 p.m. ET, and traders put the odds of no change at about 90%, according to CME FedWatch data cited by CNBC.
The numbers
| Market | Close | Change |
|---|---|---|
| S&P 500 | 7,676.77 | +0.70% |
| Nasdaq Composite | 26,169.38 | +0.82% |
| Dow Jones Industrial Average | 52,361.58 | +0.28% |
| Russell 2000 | 2,786.42 | +0.38% |
| 10-year Treasury yield | 5.00% | Unchanged |
| US crude (WTI, December, settled) | $101.76 | -1.46% |
| Bitcoin (about 4 p.m. ET; 24-hour change) | About $79,800 | About -0.3% |
Index closes are from Yahoo Finance and CNBC, and the 10-year yield is from the Treasury’s daily yield curve; the “best day since” count is ours, from Yahoo Finance closes.
Get the close in your inbox
Every market day, the stories that moved stocks and why.
Mostly Markets is for information and education only and isn't investment advice. Nora Whitfield is a pen name. Prices are from Nasdaq and CNBC as of the time stated.
