Stock Market Today: Stocks Rise After PPI Report, Arm IPO
The main indexes closed comfortably higher, while Arm stock soared on its first day of trading.
Profit and prosper with the best of Kiplinger's advice on investing, taxes, retirement, personal finance and much more. Delivered daily. Enter your email in the box and click Sign Me Up.
You are now subscribed
Your newsletter sign-up was successful
Want to add more newsletters?
Stocks opened higher Thursday following the latest inflation data and built on those gains as the session wore on. Investor sentiment also got a lift from Arm Holdings' (ARM) initial public offering (IPO), with the chipmaker sizzling on its first day of trading.
This morning's producer price index (PPI), which measures what businesses are charging suppliers for goods, painted a similar picture to yesterday's Consumer Price Index (CPI). Specifically, the Bureau of Labor Statistics said earlier the August PPI rose 0.7% month-over-month, faster than July's 0.4% increase, as gas prices spiked. Core PPI, which excludes volatile food and energy prices, was unchanged from the month prior, but rose at a quicker annual pace (3.0% vs July's 2.9%).
Also on the economic calendar was initial jobless claims, which edged up by a modest 3,000 last week to 220,000. Additionally, retail sales increased for a fifth straight month in August due to higher sales at gas stations.
From just $107.88 $24.99 for Kiplinger Personal Finance
Become a smarter, better informed investor. Subscribe from just $107.88 $24.99, plus get up to 4 Special Issues
Sign up for Kiplinger’s Free Newsletters
Profit and prosper with the best of expert advice on investing, taxes, retirement, personal finance and more - straight to your e-mail.
Profit and prosper with the best of expert advice - straight to your e-mail.
None of these data points does much to move the needle on expectations the Federal Reserve will pause rate hikes at next week's meeting. Indeed, futures traders are pricing in a 97% chance the central bank will keep interest rates unchanged at next week's meeting, according to CME Group.
Arm IPO comes in hot
The day's headlines did not solely revolve around the economy and interest rates, however. Another major news story was Arm's blockbuster IPO. The Softbank-owned chipmaker that was previously a Nvidia (NVDA, +0.2%) takeover target last night priced its IPO at $51 per share – the high end of its range – and opened today at $56.10. Shares reached $66.28 in intraday trading before settling at $63.59.
"The ARM IPO is the most hyped listing we've had in the markets for a while, with rising rates and volatility in equity markets dampening new listings over the past two years," says Kyle Rodda, senior market analyst at brokerage firm at Capital.com.
But not everyone is as excited as investors about the Arm IPO. David Trainer, CEO New Constructs, a research firm powered by artificial intelligence, says this offering creates "a valuation that is completely disconnected from the company’s fundamentals." As such, there's likely "very limited upside ahead" for ARM.
Buffett sells HPQ shares
Elsewhere, HP (HPQ) slumped 1.8% after a regulatory filing revealed Warren Buffett's Berkshire Hathaway (BRK.B, +0.5%) sold 5.5 million shares of the PC and printer maker. Buffett & Co. initiated a stake in HPQ in the first quarter of 2022 and owned 120.9 million shares at the end of Q2 2023, representing 1.1% of the Berkshire Hathaway equity portfolio.
As for the major indexes, the Nasdaq Composite rose 0.8% to 13,926, the S&P 500 gained 0.8% to 4,505, and the Dow Jones Industrial Average added 1.0% to 34,907.
Related content
Profit and prosper with the best of Kiplinger's advice on investing, taxes, retirement, personal finance and much more. Delivered daily. Enter your email in the box and click Sign Me Up.

With over a decade of experience writing about the stock market, Karee Venema is the senior investing editor at Kiplinger.com. She joined the publication in April 2021 after 10 years of working as an investing writer and columnist at a local investment research firm. In her previous role, Karee focused primarily on options trading, as well as technical, fundamental and sentiment analysis.
-
Why Some Michigan Tax Refunds Are Taking Longer Than Usual This YearState Taxes If your Michigan tax refund hasn’t arrived, you’re not alone. Here’s what "pending manual review" means and how to verify your identity if needed.
-
If You'd Put $1,000 Into Caterpillar Stock 20 Years Ago, Here's What You'd Have TodayCaterpillar stock has been a remarkably resilient market beater for a very long time.
-
Good Stock Picking Gives This Primecap Odyssey Fund a LiftOutsize exposure to an outperforming tech stock and a pair of drugmakers have boosted recent returns for the Primecap Odyssey Growth Fund.
-
If You'd Put $1,000 Into Caterpillar Stock 20 Years Ago, Here's What You'd Have TodayCaterpillar stock has been a remarkably resilient market beater for a very long time.
-
Dow Dives 521 Points as Goldman, AmEx Slide: Stock Market TodayNews of Block's massive layoffs exacerbated AI worries across the financial sector.
-
Big Nvidia Numbers Take Down the Nasdaq: Stock Market TodayMarkets are struggling to make sense of what the AI revolution means across sectors and industries, and up and down the market-cap scale.
-
Nasdaq Soars Ahead of Nvidia Earnings: Stock Market TodayWednesday's risk-on session was sparked by strong gains in tech stocks and several crypto-related names.
-
Dow Absorbs Disruptions, Adds 370 Points: Stock Market TodayInvestors, traders and speculators will hear from President Donald Trump tonight, and then they'll listen to Nvidia CEO Jensen Huang tomorrow.
-
Nvidia Earnings: Updates and Commentary February 2026Nvidia reported earnings after the closing bell on February 25, and the AI bellwether's results came in higher than expected once again.
-
Stocks Make More Big Up and Down Moves: Stock Market TodayThe impact of revolutionary technology has replaced world-changing trade policy as the major variable for markets, with mixed results for sectors and stocks.
-
I'm a 55-Year-Old Dad. Here’s How My 28-Year-Old Daughter Showed Me That AXP Is Still a Solid InvestmentAmerican Express stock is still a solid investment because management understands the value of its brand and is building a wide moat around it.