Record diesel prices, U.S.-China dialogue and AI spending frame a closed Sunday

QQQ and SPY retained Friday's closes because U.S. markets were shut. U.S. diesel rose to a record $6.505 per gallon, while U.S.-China talks covered trade, investment and AI. Shipping through Hormuz continued under U.S. Navy assistance and Iran reportedly offered war-end terms via Qatar. AI headlines included a $60 billion to $70 billion custom-ASIC estimate, while U.K. and U.S. regulators intensified reviews of banks' exposure to trading firms.

Published Sep 21, 2026

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What shaped the session

Energy and inflation

U.S. diesel reached a record $6.505 per gallon, and Kashkari said inflation remained too high for reasons extending beyond oil.

Trade and AI dialogue

U.S. and Chinese officials held talks in New York on prior trade agreements, bilateral investment and artificial intelligence.

AI capital, chips and risk

AI capital and supply-chain headlines included a $60 billion to $70 billion custom-chip estimate, SoftBank's bond plan and CXMT's DRAM milestone. Regulators also increased scrutiny of bank exposure after losses tied to an AI-focused hedge fund.

Hormuz and diplomacy

The U.S. Navy assisted 97 Hormuz transits in 72 hours, while Iran reportedly sent peace terms through Qatar covering the war, frozen assets and the naval blockade.

Key news

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