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A deepening sell-off gripped Wall Street midday Wednesday as crude oil spiked on a fresh U.S.-Iran escalation just hours before the Federal Reserve's rate verdict, dragging the S&P 500 to four-week lows and knocking the Nasdaq 100 down more than 10% from prior records.

While volatile oil prices have taken much of the spotlight in the energy sector this year, increasing global energy security concerns amid geopolitical tensions, soaring data center energy demand, and substantial international investment have propelled clean energy ETF gains in 2026.

A deepening sell-off in chip and memory stocks dragged all four major U.S. equity indexes lower by midday Tuesday.

U.S. stocks splintered Tuesday as a violent global sell-off in semiconductor shares hammered the Nasdaq, even as a rotation into defensive sectors and small caps kept the Dow Jones in positive territory through midday trading.

Clean energy stocks caught a bid Monday as company-specific catalysts collided with a broader sector tailwind less than four weeks before a critical legislative deadline expires.