US Stocks Climb Monday as Anthropic Files for IPO
Key Takeaways
- •The Nasdaq rose 0.8% on Monday to lead a broad US equity advance that also lifted the S&P 500 by 0.7%, the Russell 2000 by 0.5% and the Dow by 0.3%.
- •Brazil's Bovespa index tumbled 13.5%, a double-digit decline that dwarfed the moves seen in other major markets.
- •Anthropic filed for an IPO, with the AI company expected to seek $100 billion at a valuation exceeding $1.5 trillion and targeting November 16.
- •If completed at its targeted size, Anthropic's offering would be roughly four times larger than Saudi Aramco's record $25.6 billion IPO from December 2019.
- •Investors face a packed calendar this week, with quarterly results from Microsoft, Alphabet and Amazon arriving alongside the Federal Reserve's FOMC rate decision.
US stock markets climbed on Monday, with the Nasdaq leading the advance, as a recent rout reversed to some extent and investors counted down to a heavyweight stretch of earnings from Microsoft, Alphabet and Amazon, along with this week's Federal Reserve policy decision.
Closing changes for the main US equity indexes:
- S&P 500: +0.7%
- Nasdaq: +0.8%
- Russell 2000: +0.5%
- Dow Jones Industrial Average: +0.3%
- Toronto TSX Composite: +0.4%
- Brazil Bovespa: -13.5%
Brazil's benchmark was the clear outlier on the board, its double-digit slide dwarfing the single-digit moves registered elsewhere.
One catalyst for the session was an IPO filing from Anthropic, with the artificial intelligence company expected to try to raise $100 billion at a valuation of more than $1.5 trillion and a target date of November 16. An IPO filing is the formal step that opens the process of listing a private company's shares on a public exchange. For scale, the largest IPO completed to date remains Saudi Aramco's December 2019 listing, which raised about $25.6 billion — a completed offering at Anthropic's targeted size would be roughly four times larger than that record and would add a marquee AI name to public markets.
Attention now turns to a packed calendar, with quarterly results due from Microsoft, Alphabet and Amazon — three of the largest US companies by market value — alongside the rate decision from the Federal Open Market Committee (FOMC), the US central bank's policy-setting panel. Clustering those corporate updates into the same week as the policy decision hands investors a dense run of fresh data to absorb within a matter of days.
Source: InvestingLive, published October 26, 2026.
