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US oil inventories have drained to their lowest levels since 2004 as the ongoing conflict with Iran disrupts global energy flows. The military tensions and instability in the Strait of Hormuz have forced a heavy reliance on domestic stocks, depleting buffers to a 20-year low. Industry experts warn that reaching this critically low threshold could trigger an imminent and significant jump in crude prices.
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Sign InThis depletion aligns with recent data showing persistent pressure on supplies, as the API Crude Oil Stock Change report on May 27, 2026, showed a decrease of 2.8 million barrels, following a massive 9.1 million barrel draw in the prior period per market data. Comparatively, global inventory levels remain tight relative to historical averages, providing a fundamental floor for WTI and Brent crude prices as geopolitical risk premiums remain elevated.
Traders should closely monitor upcoming inventory releases for signs of further tightening. According to the economic calendar, the EIA Weekly Petroleum Report on May 28, 2026, confirmed a draw of 3.327 million barrels, slightly narrower than the forecasted 4.1 million barrel decline. Any further escalation in regional tensions will be a primary catalyst for price volatility in the coming sessions.