Asian Markets Surge and Currencies Strengthen as Iran War Nears End; South Korea and Indonesia Tighten Derivatives to Defend FX

Bullish (0.7)Impact: High

Published on June 17, 2026 (4 hours ago) · By Vibe Trader

Asian financial markets experienced a significant rally following the announcement of a pending peace deal between the United States and Iran to end the months-long war in Iran. On Sunday, the two countries reached an agreement to permanently cease military operations, which led to a surge in market sentiment across the region on Monday. Japan's Nikkei average soared, approaching the 70,000 threshold, reflecting investor optimism that the reopening of the Hormuz Strait would alleviate energy supply concerns and stimulate economic activity. Technical analysts identified the 70,000 level as a key resistance point for the Nikkei, with support seen in the 68,000-69,000 range. Market strategists noted that the formal signing of the peace framework, scheduled for Friday, could provide further upside for equities and regional currencies, though they cautioned that any renewed tensions or delays could quickly reverse these gains [2].

Currencies across Asia, including the South Korean won and Indonesian rupiah, strengthened as risk appetite returned on the back of decreased geopolitical risk and expectations of improved energy flows. However, both South Korea and Indonesia have recently implemented restrictions on derivatives trading to limit speculative activity and defend their currencies, which had depreciated sharply since the start of the Iran war. Bank Indonesia raised rates by 0.25% at an emergency meeting to support the rupiah and signaled readiness to act further if necessary. These measures are intended to stabilize the market without excessive use of foreign reserves, which can be quickly depleted during aggressive intervention. Market participants observed that while these actions are helping to contain volatility, the currencies remain vulnerable due to ongoing external pressures, and technical analysis indicates that support levels for the rupiah and won are being tested repeatedly [1].

A Tokyo-based currency strategist commented that authorities are seeking to preserve reserves while maintaining orderly markets, with the limitation of derivatives trading serving as one tool. However, the strategist emphasized that unless energy prices stabilize, the underlying fundamentals still point to continued currency weakness. Traders are advised to monitor key resistance and support levels closely and remain cautious, as the policy environment may shift rapidly in response to geopolitical and market developments [1].

According to a Tokyo-based market analyst, the deal to end hostilities in Iran is a 'game changer' for Asian markets, particularly for Japan and South Korea, given their reliance on Middle Eastern energy. If the Hormuz Strait remains open and oil prices stabilize, sustained bullishness in equities and further currency appreciation could be expected [2]. The positive market reaction follows weeks of volatility driven by uncertainty over the conflict's outcome and disruptions to global commodity flows [2].

CONCLUSION

The announcement of a peace deal to end the Iran war has triggered a strong rally in Asian equities and currencies, especially benefiting markets reliant on Middle Eastern energy. While South Korea and Indonesia have taken additional steps to defend their currencies through derivatives restrictions and rate hikes, the overall market sentiment remains optimistic pending the formal signing of the peace framework. However, analysts caution that any setbacks in the peace process or renewed volatility in energy prices could quickly reverse these gains.

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Asian Markets Surge and Currencies Strengthen as Iran War Nears End; South Korea and Indonesia Tighten Derivatives to Defend FX | Vibetrader