Asian stock markets posted dramatic gains Tuesday evening and Wednesday morning as news of the U.S.-Iran ceasefire sparked a powerful risk-on rally across global financial markets. Japan's Nikkei index surged approximately 5%, while South Korea's Kospi gained 6%, temporarily triggering an automatic trading halt due to the rapid price movement. The recovery was particularly pronounced across Asian markets, which had been under pressure from Middle East tensions.

The rally extended beyond equities into cryptocurrency markets, where Bitcoin jumped to three-week highs near $72,738 before settling around $71,300. Oil markets moved in the opposite direction, with crude prices plummeting over 14% as fears of supply disruptions from the Strait of Hormuz subsided. West Texas Intermediate crude fell below $95 a barrel, removing significant war premiums that had built up over recent weeks.

Market observers noted the shift was particularly dramatic given the extreme pessimism that had gripped markets in recent days. The Crypto Fear and Greed Index had reached 11 on Tuesday, corresponding to "extreme fear," before the ceasefire announcement triggered the sentiment reversal. Investment strategists emphasized that while the relief rally provides short-term market support, the sustainability depends heavily on whether negotiations make meaningful progress over the two-week ceasefire period.

The coordinated global market response highlights how geopolitical tensions had been weighing on investor sentiment across asset classes. Currency markets also responded, with safe-haven flows reversing as traders moved back into risk assets. However, analysts caution that the rally remains fragile and could quickly reverse if diplomatic talks break down or the ceasefire fails to hold.