S&P 500 Record Close Driven by AI & Chip Stocks
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- S&P 500 closed at a record high on May 31, yet only 20 of its 500 constituents posted new all‑time highs, with just seven of those not tied to artificial intelligence.
- Bank of America analyst Michael Hartnett noted the 20‑stock rally mirrors the March 2000 dot‑com bubble peak, when the same number of stocks hit fresh highs.
- Micron Technology and fellow chip makers Advanced Micro Devices, SK Hynix and Samsung drove the rally, posting monthly gains of 88%, 46%, 81% and 44% respectively.
- Advance‑decline data showed weakening breadth, with only about 55% of S&P 500 stocks above their 200‑day moving average as of May 20, and the advance‑decline line falling since mid‑April.
- Ari Wald of Oppenheimer warned that the narrow rally signals vulnerability, and BCA Research’s Arthur Budaghyan echoed the call for defensive positioning as central banks tighten.
Why it matters: Portfolio managers with exposure to AI and semiconductor stocks may see sharp declines if the rally falters, while bond investors could benefit from a shift to long bonds as central banks tighten.
