Strait of Hormuz blockade set to disrupt oil supply and lift prices
President Trump announced a Strait of Hormuz blockade starting later on April 18, 2026. The Strait of Hormuz blockade is expected to disrupt global oil flows and increase prices, raising energy-driven volatility across financial markets.
The article notes that about 20% of global oil transit passes through the Strait of Hormuz, so even partial disruption could quickly spill into broader energy pricing. Traders also anticipate a market reaction that could pressure equities lower, citing S&P 500 prediction markets that lean bearish.
On Polymarket, S&P 500 movement contracts for April 14 show consensus outcomes: the April 14 “opens up or down” and “opens up or down/opens” style contracts sit at 100% “YES” with no visible trading volume and odds effectively locked at 100% “YES”. Thin liquidity could amplify swings when trading resumes.
Brent crude is the key watch level. Traders betting on a downturn are looking for Brent to break above $110, which would add further pressure on the S&P 500.
Finally, the article points to upcoming Federal Reserve commentary—especially Powell’s next speech—as a possible catalyst if monetary policy expectations shift in response to the oil shock from the Strait of Hormuz blockade.
Bearish
The announcement of a Strait of Hormuz blockade is a classic geopolitics-to-commodities shock pathway. With roughly 20% of global oil transit tied to the Strait of Hormuz, traders expect a fast rise in energy prices; higher Brent (watch level cited around $110) typically tightens financial conditions and increases risk-off sentiment, which aligns with the article’s bearish skew for S&P 500-linked prediction markets.
For crypto traders, the immediate effect is less about direct crypto fundamentals and more about cross-asset risk sentiment. Historically, sudden oil/geopolitical shocks often correlate with short-term volatility and weaker liquidity across risk assets (including BTC/ETH), as traders de-risk and wait for clearer macro signals.
Short term: likely bearish/volatile conditions—wider spreads, faster rotations, and stronger reactions around headlines and any Fed communication.
Long term: if the blockade proves contained or prices normalize, the shock can fade and markets may re-risk. But if disruptions persist, sustained higher energy costs can keep inflation/macro uncertainty elevated, which usually weighs on risk assets longer than many traders expect. The mention of watching Powell underscores that the direction could pivot quickly based on rate/policy expectations.