Asian currencies strengthened against the dollar early Wednesday, driven by risk-on sentiment fueled by hopes of a U.S.-Iran deal. President Trump's Truth Social post declaring "Great Progress" toward a final agreement with Iran boosted investor confidence across the region, creating immediate market reactions as traders positioned themselves for potential geopolitical shifts.

The U.S. dollar fell 0.5% to 1,461.30 Korean won and dropped 0.3% to 32.43 Thai baht, while the Australian dollar climbed 0.4% to US$0.7208, according to LSEG data. These movements reflect how geopolitical developments can quickly impact currency markets and regional trading strategies, with businesses adjusting their hedging approaches accordingly.

Joseph Capurso, head of Foreign Exchange at CBA, noted elevated risk appetite partly due to declining oil prices. The currency shifts demonstrate how political developments in one region can create immediate ripple effects throughout Asian financial markets, affecting business operations and investment decisions across multiple sectors from importers to exporters.