Iran Strikes South Korean Vessel in Strait of Hormuz — Dow -1.1%, S&P 500 -0.4% to 7,200.75; Brent Surges to ~$114; 10Y Treasury Yield Hits 4.44%

US financial markets fell sharply on Tuesday, May 5, 2026 as Iran struck a South Korean commercial ship in the Strait of Hormuz, sending oil prices surging and reigniting fears that 'Project Freedom' — the US military escort operation launched May 4 — could trigger a direct US-Iran naval confrontation. **Market performance (May 5 close):** - **S&P 500:** 7,200.75 (−0.4% / −29 points from May 4 close of ~7,255) - **Dow Jones Industrial Average:** 48,941.90 (−1.1%, −557.37 points) - **Nasdaq Composite:** 25,067.80 (−0.2%) - **Brent crude:** surged ~6% to **~$114.44/bbl** — near all-time war high - **WTI crude:** ~**$104.20/bbl** (+$0.78 from May 4 $103.42) - **US 10Y Treasury yield:** **~4.44%** (up 5+ basis points) — highest since mid-2025 as inflation fears reignited - **DXY Dollar Index:** **98.49** (+0.12%) — safe-haven demand as geopolitical risk spiked **Hormuz incident details:** Iran's IRGC Navy reportedly attacked and disabled a South Korean-flagged commercial vessel (a 300,000-DWT VLCC oil tanker) transiting the eastern approaches to the Strait of Hormuz — the first direct attack on a vessel from a US-ally nation since 'Project Freedom' launched on May 4. The South Korean government summoned the Iranian ambassador in Seoul and demanded the crew's immediate safe release. Iran described the seizure as a 'legitimate inspection' under its declared Hormuz transit protocols. The incident underscored the fragility of 'Project Freedom': while two US-flagged commercial vessels successfully transited the Strait on May 4, Iran was clearly unwilling to accept third-party vessel passage without inspection. Trump called the ship seizure 'a dangerous mistake' and said the US Navy was 'monitoring the situation very closely.' **Macro risk recalculation:** Wall Street analysts revised recession probability estimates upward following the incident: - Goldman Sachs: maintained ~25% but flagged elevated tail risk if escalation continues - JPMorgan: ~35% (prior: 30%) — upgraded on Hormuz escalation re-escalation - Moody's Analytics (Mark Zandi): ~48.6% — described as 'could easily cross 50%' **Upcoming catalysts (next 72 hours):** - May 6: ADP National Employment Report (April private payrolls) - May 8: BLS April 2026 Nonfarm Payrolls (consensus: ~60,000 — sharp slowdown) - May 11 (week of): Senate floor vote on Kevin Warsh as Fed Chair (~92% confirmation probability) - May 14–15: Trump-Xi Beijing summit