Brent Tops $90 as US, Iran Escalate Middle East Attacks

• Brent crude climbed to $90.79 (up 3.05%) and WTI reached $84.68 (up 2.65%), both hitting highest levels since mid-June after posting 15%+ weekly gains
• The U.S. is enforcing a naval blockade on Iranian ports while Iran is targeting vessels in the Strait of Hormuz, with vessel traffic through the strait dropping from eight to four ships on Sunday
• Barclays analysts warn oil markets are 'too complacent' about supply risks, noting inventories are at their tightest levels in five years unlike at the start of the conflict

Market Summary: Oil Prices Surge on U.S.-Iran Middle East Conflict

Key Price Movements:

Oil prices jumped 3% on Monday, July 20, 2026, with Brent crude climbing $2.69 (3.05%) to $90.79 per barrel—the highest level since June 11. West Texas Intermediate rose $2.19 (2.65%) to $84.68, matching its June 12 peak. Both benchmarks posted significant weekly gains: Brent up 15.9% (largest since April) and WTI up 15.5% (largest since early March).

Escalating Conflict:

The U.S. conducted a ninth consecutive night of attacks against Iran, while Iranian forces struck U.S. allies Kuwait and Bahrain. Both nations have targeted shipping traffic, with the U.S. enforcing a naval blockade on Iranian ports and Iran threatening vessels in the Strait of Hormuz—a critical chokepoint handling one-fifth of global oil trade.

Supply Disruption:

Vessel traffic through the Strait of Hormuz declined sharply, with only four ships passing Sunday compared to eight the previous day. A vessel was reported on fire northwest of Oman's Kumzar. Since Friday, at least three oil product tankers and one Very Large Crude Carrier entered the strait for loading.

Market Implications:

Barclays analyst Amarpreet Singh warned that markets remain "too complacent" about potential inventory impacts, noting that oil inventories are at their tightest levels in five years—unlike at the conflict's beginning. The analyst suggested the coming weeks will clarify sustainable export levels under the "dual blockades."

The escalation has driven safe-haven flows, with the dollar advancing modestly against most currencies as investor confidence remains fragile amid ongoing market turbulence.