At around 04:30 a.m. ET, the yield on the benchmark 10-year Treasury note, which moves inversely to price, was higher at around 1.7333%, while the yield on the 30-year Treasury bond was also higher at around 2.2155%.
Market participants are likely to closely monitor a flurry of central bank meetings over the coming days, with many investors hoping for further easing amid a slowdown in global growth.
The European Central Bank (ECB) will meet on Thursday, with policymakers seen as likely to announce a package that could include a rate cut.
On the data front, producer price index (PPI) and core PPI data for August will be released at around 8:30 a.m. ET. Wholesale trade data for July will be released slightly later in the session.
The U.S. Treasury is set to auction $24 billion in 9-year and 11-month notes on Wednesday.