Stock Market Update Thursday August 20, 2026 Major U.S. equity indexes sold off sharply on Thursday, posting their worst single-session declines in three weeks. The risk-off move was driven largely by a reversal in the Treasury market, as yields moved higher and reignited concerns over persistent inflation and elevated government borrowing needs. A disappointing reaction to Walmart earnings didn’t help matters, particularly given the company’s cautious guidance, which raised concerns about the resilience of the consumer.
Away From Stocks: The long bond surrendered roughly half of Wednesday’s Treasury buyback-driven rally, with the 30-year yield rising to 5.23%. The two-year Treasury yield held steady at 4.19% for a fourth consecutive session. Higher energy prices added to inflation concerns, with WTI crude advancing nearly 3% to $87 per barrel. Meanwhile, gold remained firmly bid, climbing to $4,521 per ounce, while Bitcoin pushed toward $73,000.
The volatility index (VIX) closed at a more than two-week high of 16, reflecting a modest but notable increase in investor risk aversion.

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