Inside the U.S.-Iran Peace Deal That Sent Asian Markets Soaring

Markets React: Equities Surge, Oil Plunges

The market reaction was immediate and dramatic. Stock indices across Asia soared. Japan's Nikkei 225 jumped 5.3%, leading regional gains, while South Korea's Kospi climbed 5.1% . The rally reflected a sharp re-pricing of risk as the threat of a prolonged supply disruption in the Persian Gulf receded.

The most dramatic move was in crude oil. Brent crude, the international benchmark, plunged roughly 4.5% to as low as $83.05–$83.40 per barrel—its cheapest level since early March . West Texas Intermediate (WTI) slid about 4.7% to approximately $80.89 per barrel . The price collapse was driven by the prospect that tens of millions of barrels of Iranian and regional oil that had been bottled up by the conflict could soon flow back into global markets. As one report noted, prices had now retreated more than 30% from their highs during the height of the war .

The Dollar Weakens, Lifting Asian Currencies

The sharp decline in geopolitical risk also meant a sharp decline in demand for safe-haven U.S. assets. The U.S. dollar weakened broadly, with the dollar index (DXY) sliding to its lowest level since June 5 . Concurrently, U.S. 10-year Treasury yields eased to around 4.45% as the scramble for risk-free debt faded.

This created a powerful tailwind for emerging-market and Asian currencies, which hit multi-week highs . The Malaysian ringgit strengthened to 4.0485 against the greenback , while the Philippine peso rallied aggressively . MUFG Research noted meaningful gains across Asian FX markets, observing that currencies most heavily weighed down by the Iran conflict, such as the Indian rupee, Indonesian rupiah, and Philippine peso, were outperforming as the deal was announced .

Major Banks Upgrade Forecasts

Institutional sentiment shifted quickly. JPMorgan Chase & Co. raised its recommendation on emerging-market currencies to overweight, favoring frontier markets and currencies where central banks were poised to respond to a stronger growth-inflation mix . The bank noted that the de-escalation had materially reduced the risk premium embedded in EM assets.

MUFG analysts, meanwhile, forecast further strengthening of lower-beta Asian currencies—specifically the South Korean won, Chinese yuan, Taiwanese dollar, and Malaysian ringgit—arguing that geopolitical risk premia would continue to fade and that a weaker dollar environment was conducive to sustained appreciation in these more export-oriented currencies .

Why Caution Still Dominates the Shipping Industry

Despite the exuberance on trading floors, the outlook for a swift return to normal is far from certain. Multiple analysts and shipping companies warned that full normalization of global energy flows could take months .

The obstacles are logistical as much as political. Shipping companies must contend with severe backlogs at ports and the need to renegotiate or obtain war-risk insurance clearances before committing vessels to transit the Strait of Hormuz. Most critically, lingering safety concerns about Iranian naval mines in the waterway remain a significant deterrent to a rapid rebound in tanker traffic . As Rigzone reported, shipowners were "still hunting for more details before committing to resuming transits" .

This caution was vindicated within 24 hours. On Tuesday, June 16, oil prices rebounded slightly, with Brent rising to $83.42 per barrel, as markets digested the vague specifics of the preliminary framework and competing drafts of the agreement surfaced . The bounce underscored the fragility of the deal and the market's sensitivity to any hint that the peace process could stall or that the reopening of the Strait of Hormuz might be delayed.