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2026.03.1720:30:00UTC+00U.S. API Crude Stocks Swing to Sharp Build, Signaling Softer Oil Demand

The latest data from the American Petroleum Institute (API) show a sharp reversal in U.S. crude oil inventories, with weekly crude stocks rising by 6.600 million barrels, compared with a previous decline of 1.700 million barrels. The updated figures were released on 17 March 2026.

The shift from a drawdown to a sizable build suggests a potential softening in near-term demand or a change in supply dynamics, after the prior week’s data had pointed to tightening conditions. Market participants typically monitor the API report as an early signal ahead of official U.S. government inventory statistics, using the trend in stock changes as a gauge for underlying strength or weakness in the oil market.

While full market reaction will depend on how these numbers compare with expectations and upcoming official data, the move to a notable inventory build could temper bullish sentiment that had been supported by earlier declines.

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