Asian currencies firmed slightly as the US began blockading Iranian ships, causing the dollar index to fall about 0.1% in Asian trade.
Chinese yuan slipped 0.2% after March trade data showed exports missing expectations and imports surging, widening the trade deficit.
Singapore dollar stayed flat following Q1 GDP miss and a modest tightening of its nominal effective exchange rate band.
US focus shifted to upcoming March PPI data after a sharp March CPI rise, while the Japanese yen fell 0.3% after a finance‑minister comment.