The Strategic Petroleum Reserve (SPR) has reached its lowest level since 1983, holding approximately 362 million barrels as of early 2024. This depletion is largely due to significant releases in recent years, including 180 million barrels under the Biden administration in 2022 to combat high gasoline prices and a prior release of 50 million barrels during the COVID-19 pandemic. Historically, the SPR has been tapped during supply disruptions, such as the aftermath of Hurricane Katrina in 2005, when it released 21 million barrels.

Concerns about the SPR's low inventory are amplified by the current geopolitical landscape, particularly the ongoing conflict in Ukraine and tensions in the Middle East, which could threaten global oil supplies. While the reserve can hold up to 714 million barrels, its current state raises questions about its capacity to respond effectively to a major, sustained supply shock. The Energy Department has indicated plans to refill the reserve, but the pace and scale of these efforts remain subjects of debate and depend on market conditions and congressional appropriations.

The question of when to genuinely worry hinges on the interplay of global supply, demand, and the geopolitical stability of major oil-producing regions. A significant drawdown without a clear replenishment strategy, coupled with major supply disruptions, would be the most pressing indicator of concern.