Brent crude oil — the price the world uses as its main oil benchmark — surpassed $90 per barrel on July 20, 2026, rising roughly 3% as the United States and Iran expanded military attacks across the Middle East, including the targeting of vessels in the region. Reuters

Bloomberg's reporting adds detail: Brent gained nearly 4% early before settling back to around $90. Bond prices fell as oil rose. That happens because when energy costs go up, investors worry about inflation, and they demand higher returns to hold bonds — which pushes bond prices down. Soybean and corn prices also rose, because expensive oil makes alternative fuels from crops look more attractive. Bloomberg

The July 20 escalation is the latest in a monthslong cycle of conflict that has shaken energy markets through the first half of 2026. Looking at the full arc helps explain where prices are now and what the market already expects.

On March 6, Brent settled at $92.69, up $7.28 or 8.52%, while WTI — the U.S. oil benchmark — finished at $90.90, up $9.89. Reuters Later in March, Brent dropped to roughly $99 from $112 and WTI fell to $86 from near $99 after President Trump posted about delaying a planned attack on Iran. That move had been preceded by roughly $500 million in oil-price bets placed just before the post, Reuters reported. Reuters

Tensions re-escalated in April. When the US moved to blockade Iranian ports, crude futures surged 8% above $104, the 10-year Treasury yield rose to 4.35%, and Dow Jones futures fell. Investor's Business Daily A two-week ceasefire agreement reached around April 7 produced a sharp drop: Brent fell 14.4% to $93.48, US crude fell to $96.27, and stock futures jumped. The National Desk

The ceasefire held only tenuously. On June 8, Brent topped $98 before erasing most of those gains as new attacks threatened the truce, and US stock futures slid. MarketWatch By June 11, Brent had dropped 2.9% to settle near $90 after declines triggered by remarks from Trump. Bloomberg

This history matters because it shows a pattern. Brent has traded in a roughly $90–$112 range since early March. The $90 level has repeatedly acted as a floor during ceasefires and a launch point when fighting resumes. Right now, oil sits at the low end of that range, which suggests the market has not yet fully adjusted for a sustained escalation beyond what happened in April, when the blockade briefly took Brent above $104.

A few knock-on effects are worth watching. The bond market reaction on July 20 mirrors what happened in April: bond prices fell as oil rose, and the 10-year Treasury yield — a key interest rate that influences mortgages and loans — climbed to 4.35% during that April episode. If the Strait of Hormuz, a narrow channel that carries a large share of the world's oil shipments, or other shipping lanes face sustained disruption, oil prices could climb further and intensify the inflation worries that have driven bond market behavior all year. The vessel targeting reported by Bloomberg is a direct sign of that risk.

The spillover into crops like soybeans and corn is a second-order effect. When oil gets expensive, fuels made from crops become more competitive, so crop prices rise too. That link is well known, but it usually shows up when oil supply itself is tight. Seeing it during a war-driven price spike adds another layer of complexity.

What we don't know yet is whether this escalation follows the pattern of the past four months, where each oil spike was reversed within days by a diplomatic breakthrough. The April blockade, the June ceasefire breach, and now the July intensification all produced sharp reversals quickly. If de-escalation happens again, $90 will act as a ceiling. If it doesn't, the $104 level from the April blockade becomes a more realistic target.

The $500 million in trades placed just before Trump's March post about delaying an Iran attack remains the clearest sign that someone may have had advance knowledge. Whether similar trading preceded the July 20 escalation is not yet known.