America’s emergency oil stash just hit a number it hasn’t seen in over four decades. The Strategic Petroleum Reserve dropped to roughly 349.2 million barrels as of the week ending June 5, according to federal data, marking the lowest inventory level since August 1983.

To put that in perspective, the SPR’s authorized capacity is 714 million barrels. The reserve is now less than half full.

What’s driving the drawdown

Since the conflict with Iran escalated in late February, the Trump administration has released approximately 66 million barrels from the reserve to stabilize domestic supply and keep US exports flowing while the Middle East situation remains volatile.

The math is stark. The SPR stood at 424 million barrels in late February. It now sits at 349.2 million. That’s an 18% decline in roughly three and a half months.

Weekly draws have averaged nearly 9 million barrels. Just in the most recent reporting period, inventories fell from 357.12 million barrels to the current level, a single-week drop of nearly 8 million barrels.

For context, the previous modern low point was 346.7 million barrels in July 2023, reached after the Biden administration conducted massive releases following Russia’s invasion of Ukraine. The current trajectory suggests that floor could be broken within days.

Why this matters beyond oil

Every barrel released now is a barrel unavailable for the next crisis. Refilling the reserve means buying oil at whatever the prevailing market price happens to be, which tends to be higher during exactly the kind of supply disruptions that prompted the drawdown in the first place.

The US Energy Information Administration and the Department of Energy continue to publish weekly updates on SPR status.

The crypto angle: strategic reserves and inflation hedges

The SPR’s decline arrives at an interesting moment for crypto markets. The concept of a Strategic Bitcoin Reserve, proposed as a national asset stockpile analogous to oil reserves, has gained traction in policy discussions. The contrast is hard to ignore: one strategic reserve is being rapidly depleted while another is being debated as a potential addition.

Previous periods of elevated inflation, including the post-COVID surge that accompanied the 2022 SPR drawdowns under Biden, coincided with increased institutional interest in Bitcoin as a portfolio diversifier.

Traders should watch two variables closely. First, the pace of SPR releases: if weekly draws remain near the 9-million-barrel average, the reserve could approach genuinely critical levels before year-end. Second, any signals from the administration about when or whether it plans to begin refilling, a process that would add demand to an already tight oil market.

The SPR was created after the 1973 Arab oil embargo as insurance against exactly the kind of supply disruption the US is navigating now.