Interest-rate sensitive stocks like Arm fell in response to the CPI.
Arm's valuation is based on earnings that are years away.
Shares of Arm Holdings (NASDAQ:ARM) were falling today amid a broader sell-off in tech and chip stocks after the September Consumer Price Index (CPI) came in hotter than expected.
That was enough to send tech stocks swooning as it makes it more likely that the Fed will raise interest rates at its next meeting later this month.
Missed AI’s "Act 1"? Act 2 Could Be 15x Bigger. Most investors think they missed the AI boat because they didn't buy Nvidia in 2005. But according to our analysts, we’re only at the end of "Act 1"—the R&D phase. "Act 2" is the global rollout. Continue »
Arm is especially sensitive to interest rates because most of the stock's value comes from earnings that are several years into the future, as investors are betting on strong profits from its new AGI CPU, which has yet to go on sale.
As of 3:13 p.m ET, Arm stock was down 6.7% on the news.
Image source: The Motley Fool.
The Consumer Price Index is one of the most important data points in determining the Fed's action on interest rates, and faster-than-expected inflation is more likely to trigger a rate hike to help slow the economy down and reel in inflation.
The CPI rose 3.7% on an annual basis last month, ahead of expectations at 3.6%, while core CPI, which strips out the volatile food and energy categories, was up 2.6%, compared to expectations of 2.5% growth.
Energy prices continue to surge due to the war in Iran, up 5.2% from August, and gasoline was up 9.1%.
Inflation doesn't directly impact Arm. While the company's chip designs are found in smartphones and an array of other consumer devices, the stock is down because of valuation-related adjustments. As interest rates go up, the discount rate in the discounted cash flow also goes up, and that makes earnings in the future less valuable than they were.
Investors should expect Arm stock to continue moving up and down according to interest rate expectations.
Before you buy stock in Arm Holdings, consider this:
The Motley Fool Stock Advisor analyst team just identified what they believe are the 10 best stocks for investors to buy now… and Arm Holdings wasn’t one of them. The 10 stocks that made the cut could produce monster returns in the coming years.
Consider when Netflix made this list on December 17, 2004... if you invested $1,000 at the time of our recommendation, you’d have $379,986!* Or when Nvidia made this list on April 15, 2005... if you invested $1,000 at the time of our recommendation, you’d have $1,404,152!*
Now, it’s worth noting Stock Advisor’s total average return is 948% — a market-crushing outperformance compared to 215% for the S&P 500. Don't miss the latest top 10 list, available with Stock Advisor, and join an investing community built by individual investors for individual investors.
See the 10 stocks »
*Stock Advisor returns as of October 14, 2026.
Jeremy Bowman has positions in Arm Holdings. The Motley Fool has positions in and recommends Arm Holdings. The Motley Fool has a disclosure policy.