The U.S. Treasury Department allowed a temporary sanctions waiver for Russian seaborne oil to lapse on Saturday [1].

This decision removes the legal permission for countries to purchase Russian oil that was already in transit. The move comes as the U.S. government seeks to stabilize global energy markets after significant disruptions to supply chains.

The waiver officially expired at 12:01 a.m. Eastern Daylight Time on May 16, 2026 [3]. This expiration follows a period of temporary relief, as a previous extension had lasted for 30 days [4].

According to the U.S. Treasury, the decision was made to avoid further market distortions [5]. These distortions were primarily driven by Iran's closure of the Strait of Hormuz, an event that caused oil prices to rise and created widespread supply shortages [5].

By letting the waiver lapse, the U.S. returns to a stricter enforcement of sanctions against Russian energy exports. The Treasury's action ensures that the temporary window for importing seaborne crude, which had been opened to mitigate the immediate impact of the Hormuz closure, is now closed [1].

Government officials said the move is intended to align current trade practices with long-term sanctions goals while acknowledging that the immediate crisis necessitating the waiver has evolved [1].

The waiver officially expired at 12:01 a.m. Eastern Daylight Time on May 16, 2026.

The lapse of this waiver signals a return to aggressive economic pressure on Russia. While the U.S. briefly prioritized global price stability over sanctions following the closure of the Strait of Hormuz, the expiration suggests the Treasury believes the market can now absorb the restriction without triggering a secondary price spike.