Arm Holdings and Advanced Micro Devices powered a sweeping advance in artificial intelligence equities on Monday after President Donald Trump declared a U.S.-Iran peace agreement complete, a deal set to reopen the Strait of Hormuz and ease global energy supply concerns. The Philadelphia Semiconductor Index climbed 5.4%, the Nasdaq Composite added 3.1%, and the S&P 500 rose 1.7% to close at 7,554, a fresh record.
Today's biggest movers
| Ticker | Close | Day | 1mo | YTD |
|---|---|---|---|---|
| $ARM | $412.55 | +8.33% | +97.24% | +259.58% |
| $AMD | $547.26 | +6.98% | +29.04% | +144.89% |
| $LRCX | $388.92 | +6.03% | +36.60% | +110.16% |
| $PLTR | $134.71 | +5.25% | +0.54% | -19.75% |
| $META | $593.48 | +4.67% | -3.38% | -8.75% |
| $ORCL | $192.64 | +4.62% | -0.16% | -1.57% |
| $TSM | $441.40 | +4.12% | +9.16% | +38.11% |
| $NVDA | $212.45 | +3.54% | -5.71% | +12.50% |
| $SNOW | $240.78 | +3.44% | +52.91% | +11.11% |
| $CRM | $164.55 | -0.81% | -5.16% | -35.12% |
ARM jumps 8.3% as analyst upgrades pile in after record fiscal year
Arm Holdings PLC (NASDAQ: ARM) surged 8.3% to $412.55, the sharpest single-session gain in our coverage universe and the stock's largest one-day advance since January. The move caps a 97% one-month run and leaves ARM up 260% year to date, extending a multi-year re-rating driven by its royalty exposure to AI inference chips in data centers. Multiple price-target increases preceded Monday's session: Mizuho raised its target to $425 from $360, Barclays to $360 from $250, and KeyBanc to $300 from $170. The upgrades followed ARM's record Q4 fiscal 2026 quarter, in which revenue rose 20% year on year to $1.49 billion, licensing revenue grew 29% to $819 million, and data center royalties more than doubled. Chief Executive Rene Haas told analysts the company's $15 billion in-house chip revenue target could be reached ahead of schedule, citing overwhelming demand from hyperscalers deploying ARM AGI processors in next-generation AI server racks. For context on the two-session build into today, see last Thursday's recap of the agentic CPU upgrade cycle.