Iran's announcement that it has closed the Strait of Hormuz sent oil prices surging more than 3% on Wednesday, reviving supply concerns that have weighed on energy markets for months.

WTI crude climbed to $78.45 per barrel, while Brent crude rose to $82.87 per barrel following the Iranian declaration. The move caps weeks of escalating tensions in the Middle East, where geopolitical risk premiums have remained embedded in oil valuations despite softer global demand data.

The Strait of Hormuz serves as one of the world's most critical chokepoints for oil transportation. Roughly 20% of global oil supply flows through the waterway daily, connecting Persian Gulf producers to international markets. Any disruption to shipping through the strait carries immediate consequences for energy prices and global supply chains.

Iran's closure declaration reflects broader regional instability. The country has repeatedly threatened to block the strait during periods of heightened tension with the U.S. and its regional allies. Previous threats have triggered sharp rallies in crude futures, though actual closures have remained largely theoretical rather than implemented at scale.

Market reaction extended beyond crude. Energy sector stocks gained ground as investors repositioned for higher oil valuations. The selloff that has hammered energy equities since June reversed course on the back of renewed supply anxiety.

Traders face competing narratives heading into the final quarter. Weak global manufacturing data from China and Europe signals softer energy demand. Simultaneously, geopolitical supply shocks create upside volatility in prices. Oil has spent much of 2024 oscillating between demand destruction fears and supply disruption premiums.

The 3% jump reflects the market's assessment that supply security outweighs current demand weakness. Investors holding long positions in energy benefited from the intraday move. Short positions across the complex faced pressure as the rally built through the session.

Geopolitical risk in the Middle East shows no signs of abating. Further escalation could push crude into the $85 to $90 range, where strong resistance exists from earlier trading.