Asian currencies traded mostly flat on Monday as the U.S. dollar remained close to multi-month lows, with investors assessing Treasury bond buyback plans alongside renewed trade tensions and geopolitical risks.
The U.S. Dollar Index was little changed at 98.83 by 00:44 ET (04:44 GMT), staying near its weakest level since mid-May after falling almost 1% last week.
Pressure on the dollar followed the U.S. Treasury’s decision to at least double long-term Treasury buybacks to $4 billion per operation. The program is intended to improve bond market liquidity and ease pressure on longer-term yields.
While the announcement initially pushed Treasury yields lower, concerns about U.S. government finances remain. Federal debt has surpassed $40 trillion, while the deficit is nearing $1.8 trillion, fueling worries that heavy borrowing and increased Treasury issuance could keep long-term yields elevated.
Markets are also awaiting Nvidia’s earnings and Federal Reserve Chair Kevin Warsh’s Jackson Hole speech later this week for signals on U.S. interest rates and global risk sentiment.
The Japanese yen strengthened slightly, with USD/JPY falling 0.1% to below 159. Traders are watching Bank of Japan Deputy Governor Ryozo Himino for potential monetary policy clues.
Meanwhile, USD/CAD gained 0.2% after U.S.-Canada trade negotiations collapsed. Washington imposed 50% tariffs on $20 billion worth of Canadian goods, while Ottawa announced matching retaliatory tariffs beginning September 8.
Elsewhere, China’s yuan and India’s rupee were broadly unchanged. USD/KRW declined 0.3%, while the Singapore dollar remained steady. The Australian dollar slipped 0.1% against the greenback.
Geopolitical uncertainty also kept currency traders cautious ahead of new U.S. sanctions on Iran. Treasury Secretary Scott Bessent is expected to unveil details later Monday, with markets watching for measures targeting Iranian oil exports.
Oil prices fell more than $1 per barrel as traders took profits ahead of the announcement, although concerns over the Strait of Hormuz continued to pose risks to global energy supplies, inflation and currency markets.


Oil Prices Retreat as Markets Await Tougher Iran Sanctions
Oil Prices Ease as US-Iran Tensions Keep Brent on Track for Weekly Gain
Asian Currencies Rise as Dollar Weakens, Treasury Yields Climb
South Korea Producer Prices Fall 0.4% in July
Asian Stocks Rise as Korea Tech Shares Rebound
China opens new Arctic trade route – but obstacles will prevent its wider use
Gold Holds Above $4,500 as Dollar Weakens
Canada Announces Dollar-for-Dollar Retaliation Against 50% U.S. Tariffs
Merz Pushes Faster Reforms to Revive German Economy
Wall Street Ends Higher as Crypto Stocks and Materials Rally
Oil Prices Rise as Trump Threatens Tougher Iran Economic Measures
US Debt Tops $40 Trillion as Global Borrowing Costs Surge
Australia Unemployment Rate Hits 4.5% as Jobs Fall in July
Iran Allows Iraqi Oil Tankers Through Strait of Hormuz
US Plans ‘Toughest Sanctions in History’ on Iran, Bessent Says
Europe EV Sales Surge as High Fuel Prices Drive Demand 



