Hot energy-driven inflation and Iran tensions slam AI and chips, send investors into defensive stocks

Today probably felt like, “Wait, inflation was expected and the market still tanked?” That’s basically what happened: the data didn’t calm anyone, and the pressure landed right on the hottest part of the market — AI and chips.

What actually hit stocks

Headline inflation for May came in at 4.2% year‑over‑year, the highest in about three years and a step up from April’s 3.8%. That jump is largely about more expensive energy, with the U.S.–Iran war and shipping issues near the Strait of Hormuz keeping oil prices elevated.

Under the surface the report was softer: core inflation (which strips out food and energy) rose only 0.2% on the month, below forecasts. So: headline hot, core tame. That combination leaves the Federal Reserve in a tight spot — not enough relief to start talking rate cuts, not bad enough to trigger an emergency move either.

Markets read that as: rates stay high, and richly valued growth/AI names stay in the crosshairs.

• S&P 500 fell about 1.6%, Nasdaq nearly 2%, Dow about 1.8%, Russell 2000 just under 1%.
• Volatility picked up: the VIX jumped to about 22, up ~11% on the day.

Geopolitics added another layer: renewed U.S.–Iran tension and promises of more strikes kept the “risk-off” mood going.

Where the money moved

The selling was very specific: hit what’s been working the hardest.

• High‑beta and AI/semis were smashed. A high‑beta ETF dropped ~3.6%. Individual names: Nvidia ~‑3.7%, AMD ~‑4.9%, Micron ~‑4.7%, Broadcom ~‑5.1%, Marvell ~‑5.4%. Supermicro, a big AI server play, sank almost 28% after announcing plans to raise up to $7B in new equity.
• Growth stocks fell more than value. Tech, industrials, basic materials, and consumer‑cyclical names led the declines.
• Defensives caught a bid: consumer staples rose ~1.7%, energy ~1.5%, with utilities and real estate roughly flat to slightly positive.

Breadth backed up the risk‑off story: only about 41% of stocks rose, more names are making fresh 20‑day lows than highs, and downside moves were larger than upside ones.