Oil prices jumped nearly 7% on July 23, 2026, settling at $100.69 per barrel after hitting a high of $102. The cause: Houthi militants attacked two Saudi oil tankers in the Red Sea (Reuters). This is the first time oil has stayed above $100 during this crisis. A key worry is the Strait of Hormuz, a narrow waterway that about a fifth of the world's oil passes through. A blockade there would be a major problem (Washington Post). At the same time, the 10-year U.S. Treasury yield broke through 4.7%, its highest level since January 2026 (CNBC).

To see how big this jump was, look at two days earlier. On July 21, 2026, oil was trading at $92.42 on very low volume — only 1,461 contracts changed hands (CME Group). Two days later, oil settled $8.27 higher. That is almost a 9% jump from a quiet trading day to a mad scramble to buy.

What Happened

The trigger is simple: Houthi forces struck two Saudi tankers in the Red Sea, raising the threat to one of the world's most important shipping routes for oil. The concern goes beyond the immediate damage. If the Strait of Hormuz gets blocked, it would affect roughly a fifth of all oil consumed worldwide. The Wall Street Journal ran the headline "Brent Holds Above $100 As Hormuz Blockade Remains Key Concern" (WSJ). The WSJ also noted that oil prices dipped slightly in early Asian trading, calling it a likely technical correction (WSJ Energy & Utilities Roundup).

The Bond Market Reacts

The bond market reacted right away. The 10-year Treasury yield is like the interest rate the U.S. government pays to borrow money for ten years. When it goes up, it usually means investors are worried about inflation or see less economic growth ahead. This yield pushed above 4.7%, its highest since January 2026. Higher oil prices feed into inflation — the general rise in prices over time — after a delay. The CNBC report suggested the stock market can no longer ignore geopolitical risk (CNBC).

What Comes Next

The question now is whether oil prices stay high or fall back. The low trading volume on July 21 suggests not many people were positioned for this event. The surge that followed suggests traders who bet oil would fall had to scramble to buy back contracts, pushing prices even higher. Think of it like a crowd rushing for the exit at once. That kind of rally often overshoots and then pulls back quickly if the supply problem turns out to be temporary.

Why This Matters Beyond Oil

The broader context here is what happens when expensive oil meets a slowing economy. If oil stays above $100, it raises transportation costs, factory costs, and eventually the price of everyday goods, with a delay of about one to two quarters. If the Federal Reserve — the central bank that sets interest rates — has to deal with rising inflation from energy prices while the economy is already slowing down, that creates a painful combination called stagflation: stagnant growth plus rising prices. That is not a prediction. It is the risk the bond market is already pricing in.

What We Still Don't Know

What remains unresolved is whether the Red Sea disruption lasts. A single attack pushed oil up nearly 9% in two days. Whether that becomes a new normal or a temporary spike depends on how many more attacks happen and how maritime security forces respond. The slight dip in Asian trading suggests some traders think the price went too far, too fast. But the underlying risk has not gone away. The concern about a Hormuz blockade is still active.

For anyone watching their wallet, the situation is delicate. The 10-year Treasury at 4.7% reflects a market bracing for both higher prices and slower growth. Oil at $100 makes both worse. What we know happened — the attacks, the price jump, the yield break — is clear. What we don't know — whether Hormuz is genuinely at risk of a blockade, and whether the Fed will change course — is where the real danger sits.