Asian Markets Slide as US-Iran Peace Talks Fail and Hormuz Blockade Announced

Asian equities faced widespread selling pressure on Monday after weekend negotiations in Islamabad between the United States and Iran failed to produce a ceasefire agreement. The diplomatic breakdown marks a critical turning point in a conflict that has now entered its second month, with U.S. Vice President JD Vance stating that Iran chose not to accept U.S. terms. The geopolitical instability was exacerbated by President Donald Trump's announcement that the U.S. Navy will blockade the Strait of Hormuz until Iran relents. This move targets one of the world's most vital oil transit points, sparking immediate volatility in energy and currency markets. Brent crude surged 7% to approximately $102 per barrel, while the U.S. dollar strengthened on renewed safe-haven demand. Market reactions across Asia were predominantly negative. Japan's Nikkei 225 fell 0.74% to 56,502.77, dragged down by semiconductor and AI stocks, while Hong Kong's Hang Seng index dropped 0.90% to 25,660.85. South Korea's Kospi declined 0.86%, with Samsung Electronics and Hyundai Motor falling 2.4% and 2.3%, respectively. Australia's S&P/ASX 200 dipped 0.39% to 8,926. China's Shanghai Composite ended marginally higher at 3,988.56, despite threats from the U.S. of 50% tariffs on Beijing should it provide military support to Iran. Simultaneously, the Asian Development Bank warned that regional growth could slow even if oil prices remain relatively stable. The escalation follows a period of domestic economic stress in the U.S., where March headline inflation rose 3.3% year-on-year and consumer sentiment hit a record low in April, driven by war concerns and rising inflation expectations.