Key Highlights

● Arm rose to $298.14 on September 29, 2026, after being hit hard with much of the chip sector on Monday.

● One market note said chip stocks are snapping back after a brutal session, but the recovery is anything but even.

● Marvell climbed to $262.08, Applied Materials rallied hard, and Nvidia finished little changed after its $150 billion buyback announcement.

● The chip bounce lifted the Nasdaq-100 to 30,339.33 but was not enough to lift the rest of the market.

Arm Holdings plc (NASDAQ:ARM) surged on Tuesday, September 29, 2026, rising to $298.14 as semiconductor stocks staged a relief rally after a steep selloff the day before. Arm had been hit hard on Monday, September 28, along with much of the chip sector. No specific reason was reported for Arm, and the move appeared to reflect the sector bounce.

A Relief Rally in Chips

The rebound was broad but uneven. A chip-focused ETF, SOXX, comfortably outpaced the QQQ fund that tracks the Nasdaq-100, the SMH semiconductor ETF also rose, and the U.S. chip index climbed. Marvell Technology climbed to $262.08 and Applied Materials rallied hard. Qualcomm swung between gains and losses, with sources split on its direction, underscoring the uneven recovery. Nvidia finished little changed, with sources differing on direction, even after announcing a $150 billion share buyback the day before.

Why AI News Matters for Arm

Arm designs the processor architecture used in almost every smartphone and a growing number of data-center chips. It licenses its designs and collects royalties from chipmakers rather than Manufacturing chips itself, which ties it closely to the health of the chip industry and increasingly to AI spending, as cloud giants build custom Arm-based processors. A leaked Anthropic IPO prospectus, according to reports, pointed to a valuation target above $2 trillion, 12-fold Revenue growth in 2025 and $518 billion of planned compute and infrastructure obligations. AMD also agreed to buy World Labs for $8.2 billion in stock.

The Broader Market

The chip bounce helped the Nasdaq-100 edge higher to 30,339.33, but it was not enough to lift the rest of the market. The Nasdaq Composite ended essentially flat at 26,797.54, the S&P 500 slipped 12.85 points to 7,670.84, and the Dow fell 131.59 points to 51,349.92. Rising long-term Treasury yields were the main weight on the market, with the 30-year at its highest level since 2002 and the 10-year near a two-decade high.

A Note of Caution

One market commentator said a bounce in the mega-caps after a weak day has been the recent pattern, but it won't change the bigger issue. Consumer confidence dropped to 81.9 from 88.6, the lowest since 2014, according to the Conference Board. New York Fed President John Williams said there is no need for urgency after the central bank's September meeting, and odds of an October rate hike fell to roughly a coin flip.