〔Overnight Brief〕Iran Declares Hormuz Closed as US Vows Unprecedented Blockade; Drone Losses and Tanker Attacks Keep Oil Markets on Edge

Control and Blockade Rhetoric

• Iran's IRGC navy commander said the Strait of Hormuz is currently closed, with Iran maintaining "comprehensive, decisive control" over all movements in the Strait ^[1][2]. He added that "the truth must be seen on the battlefield, not in US announcements and statements" ^[3].
• US Treasury Secretary Bessent said Washington will impose "unprecedented" measures on Iran, combining economic isolation with a sustained blockade of Hormuz to cut off all access to Iranian ports, and promised more announcements next week ^[4][5].
• President Trump said the United States is in control of the Strait of Hormuz and will "keep it" ^[6]. Vice President Vance said the primary goal is keeping oil and gasoline prices low for Americans ^[7]. Defense Secretary Hegseth said the US can maintain its blockade of Iran as long as necessary ^[8].
• Iran's supreme leader adviser Mohber warned that if Iran's conditions are not met, the leadership has decided to escalate the conflict, and argued that the current situation proves the US cannot protect its Gulf allies ^[9]. He called for a "Hormuz Economic Security Mechanism" to replace reliance on US military guarantees ^[9].
• Iran is demanding compensation for the Hormuz oil spill it allegedly caused ^[10] and is citing environmental damage in a push for shipping fees ^[11].

Military Losses and Attacks

• The US has lost at least 45 MQ-9 Reaper drones in the war with Iran, roughly 25% of the approximately 185 it had before the conflict, according to US officials cited by The Washington Post ^[12][13]. Each drone costs $30–50 million, putting total losses above $1.3 billion ^[12][13]. Not all losses were from shootdowns; some crashed after losing contact with operators, though the exact number is unknown ^[13].
• US Central Command said media reports alleging seven sailors died in a brawl aboard USS Abraham Lincoln and suggesting a spike in suicidal ideation are false, noting the carrier has an 84.4% crew reenlistment rate, among the highest in the Navy ^[14].
• Abu Dhabi National Oil Company said two of its vessels were attacked while transiting the Strait of Hormuz on the evening of August 13, with no injuries reported ^[15][8].
• Yemen's Houthi-controlled SABA said the group attacked Saudi Aramco's refinery in Jazan using two drones ^[16][8]. Houthi forces also launched two ballistic missiles at important facilities in Harqia near the Bab el-Mandeb Strait ^[17][8].
• Houthi forces warned that if Saudi Arabia launches a full-scale offensive against Yemen, they will target Saudi oil fields, airports, and power and water infrastructure ^[8]. Saudi Arabia is considering supporting a Yemeni army ground offensive to retake Red Sea coastal areas from the Houthis, according to a Jerusalem Daily report ^[8].

Oil Market and Supply Routes

• Oil prices edged lower in early trading, with front-month WTI futures down 0.1% at $81.20 per barrel, amid mixed signals ^[18].
• Analysts at ANZ Research said Gulf producers such as the UAE and Saudi Arabia are doing their utmost to keep exports flowing, including switching transponders to move cargoes undetected through the Strait ^[18]. In contrast, Houthi attacks on Saudi Aramco's Jazan refinery are adding to supply concerns ^[18][16].
• A second very large crude carrier appeared to be docked at Saudi Arabia's main Persian Gulf oil export terminal, suggesting loading activity may be recovering, according to EU Sentinel-2 satellite imagery ^[19]. The terminal can load about 2 million barrels per vessel ^[19].
• Gulf states are spending billions of dollars on pipelines that bypass the Strait of Hormuz to reduce geopolitical risk, according to The New York Times ^[20].
• UK Maritime Trade Operations said commercial traffic through the Strait remains at restricted levels ^[8], while Iranian media reported that cleanup of an oil spill in the Strait is in its final stage ^[8].
• Bloomberg reported that oil held its decline as traders monitored efforts toward a deal that could reopen the Strait, even as fresh attacks on tankers and energy infrastructure kept the market on edge ^[21].

Coalition and Diplomatic Moves

• Saudi Arabia's Defense Ministry said 15 countries have signed a joint statement and 13 have completed domestic procedures to formally join a maritime defense coalition ^[22].
• Thirty-nine countries participated in the third planning meeting of the multinational maritime defense coalition in Jeddah, according to the Saudi Defense Ministry ^[23].
• The US is prepared to sustain its blockade of Iran "as long as needed," according to Defense Secretary Hegseth, while traders watch for any deal that might reopen the Strait ^[8][21].