Asian currencies traded in tight ranges Tuesday as the U.S. dollar strengthened 0.2%, with investors assessing President Trump's new 15% global tariff announcement. The measures followed a Supreme Court ruling that struck down an earlier emergency tariff program, while Trump warned countries attempting to "play games" in trade negotiations could face steeper levies.

The yen weakened 0.4% against the dollar as expectations for Bank of Japan policy tightening remained tempered. Other moves were muted, with the South Korean won gaining 0.1%, Singapore dollar up 0.1%, and the Indian rupee flat. Export-reliant economies felt particular pressure from the tariff uncertainty.

China's yuan edged 0.2% lower as the People's Bank of China kept its loan prime rates unchanged, signaling measured support for growth while controlling financial risks. The steady policy stance came as Chinese markets reopened following the Lunar New Year holiday, with trade tensions continuing to shape regional currency markets.