What happened in global financial markets on Monday after the Trump administration announced sweeping Iran sanctions under Treasury Secretary Scott Bessent’s “Operation Economic Outcast,” and how did the sanctions’ targets—digital assets, technology, gold, aviation, and shipping—

Global equities were mixed-to-lower on Monday, but the selloff was driven at least as much by technology weakness and policy uncertainty as by the new Iran measures. Importantly, the available closing reports contradict the premise that oil and U.S. Treasury yields rose that day: oil fell by more than $2 a barrel and Treasury yields dipped. 2

What the sanctions changed

• Treasury Secretary Scott Bessent announced “Operation Economic Outcast,” an expanded secondary-sanctions campaign intended to isolate Iran and its commercial enablers from the U.S. financial system. 4
• The campaign targeted Iran-linked activity in digital assets, technology, gold, aviation and shipping, raising risks for firms and countries that facilitate business with Tehran. 5
• This increased geopolitical and shipping-route uncertainty, including potential risk around the Strait of Hormuz, but the immediate oil-market response was counterintuitive: crude declined rather than surged. 2

Monday market moves

Evidence for several requested index moves is incomplete or inconsistent across available live-market snapshots. The best-supported closing figures are:

• Kospi: down 3.12%, to about 6,697. 5
• Hang Seng: down 1.89%, to 25,517. 5
• Nikkei 225: down 0.76%, to 65,516. 3
• Shanghai Composite: down 0.59%, to 3,882. 5
• Sensex: down 0.22%, to 77,369. 5
• Nifty 50: down roughly 0.14%—32.95 points to 24,219.05—based on the reported closing level and point decline.
• S&P/ASX 200: up 0.66%, to 9,163.30. 8
• DAX: down 0.11%, to 26,106.60. 7
• FTSE 100: Insufficient evidence in the supplied sources to state a reliable Monday close or percentage move. Europe overall was essentially flat, with the STOXX 600 unchanged. 6

Why the regional split

• South Korea was hit hardest because its benchmark is heavily exposed to semiconductors and AI-linked technology, where investors were taking risk off ahead of Nvidia’s earnings; broader tech weakness also pulled down the U.S. Nasdaq. 1
• Hong Kong also fell sharply because its market has substantial technology and China-sensitive exposure, making it vulnerable to the same risk-off move and uncertainty over sanctions’ possible implications for Iran’s trading partners. 5
• Japan and India had smaller losses: Japan’s Nikkei declined less than the Kospi, while India’s Sensex was down only 0.22%, suggesting relatively greater resilience from domestic-sector composition and less direct technology concentration. 35
• Australia gained, consistent with its more commodity- and financial-heavy index mix and with oil actually declining on the day, which reduced immediate inflation and energy-import anxiety. 28

India: the oil and rupee risk

India remains vulnerable if the geopolitical situation ultimately pushes crude higher. More expensive oil would enlarge the country’s import bill and current-account pressure, raise domestic inflation risk, and increase demand for dollars from importers—factors that can weaken the rupee. This was a forward-looking risk rather than Monday’s immediate oil-price outcome, since crude settled lower that day. 2

Next catalysts

The next directional move is likely to hinge on:

• the Fed’s Jackson Hole symposium and Kevin Warsh’s first speech as Fed chair;
• Nvidia’s earnings, which will test the durability of the AI/semiconductor trade;
• the PCE inflation report, a key input for U.S. monetary-policy expectations;
• whether markets maintain their roughly 40% implied probability of a September Fed rate hike;
• any escalation in U.S.-Iran tensions, sanctions enforcement, or threats to Gulf shipping.

The immediate market message was caution rather than panic: global equities slipped, European shares were flat, and the U.S. S&P 500 and Nasdaq fell 0.28% and 0.76%, respectively, as technology weakness dominated the session. 16