Key keywords: oil prices, Donald Trump, Iran strike cancellation, US-Iran tensions, WTI crude, Brent crude, Middle East geopolitical risk, Strait of Hormuz, energy market volatility On June 20, 2019, global crude oil markets recorded a dramatic intraday reversal after former U.S. President Donald Trump announced he had cancelled pre-planned military strikes against Iran at the last minute, erasing earlier gains driven by escalating cross-border tensions. The sequence of events began earlier that day, when Iranian military forces shot down a U.S. RQ-4 Global Hawk surveillance drone over the Strait of Hormuz, claiming the aircraft had violated Iranian airspace, while U.S. officials argued the drone was operating in international airspace. The incident sparked immediate fears of an imminent U.S. military retaliation, sending oil prices surging more than 4% in morning trading. Brent crude, the global benchmark, climbed as high as $69.16 per barrel, while U.S. West Texas Intermediate (WTI) crude hit $59.93 per barrel, marking their biggest intraday jumps in three weeks. Market analysts noted at the time that the price surge was driven by a rapid buildup of geopolitical risk premium, as traders priced in the possibility of a wider conflict that could disrupt oil shipments through the Strait of Hormuz. The narrow waterway, which borders Iran, carries roughly 20% of the world’s seaborne oil exports, making it one of the most critical energy choke points on the planet. For months prior to the drone downing, tensions between the U.S. and Iran had been rising steadily after the Trump administration withdrew from the 2015 Iran nuclear deal and reimposed sweeping economic sanctions targeting Iran’s oil exports, cutting off nearly 2 million barrels per day of Iranian crude from global markets. However, the upward momentum was completely reversed shortly after 7 p.m. ET, when Trump posted a series of tweets confirming that he had ordered the strikes called off 10 minutes before they were set to be executed, after learning that the operation would result in an estimated 150 Iranian casualties, which he described as 'not proportionate to shooting down an unmanned drone'. Within 15 minutes of the announcement, Brent crude fell 2.3% to settle at $65.38 per barrel, down 1.7% for the day, while WTI dropped 1.1% to close at $56.95 per barrel. The price reversal also spilled over into related equity markets: U.S. energy stocks, which had risen earlier in the day on the back of higher oil prices, fell sharply in after-hours trading, while airline and logistics stocks gained as investors priced in lower expected fuel costs. Industry experts emphasized that while the immediate risk of conflict had faded, the underlying tensions between the U.S. and Iran remained unresolved, meaning oil markets would continue to see elevated volatility in the months ahead. Any further escalation between the two sides, they warned, could trigger another immediate price spike as markets factor in potential supply disruptions.