Treasury prices fell Tuesday on concerns about a growing appetite for debt among insurance issuers and the U.S. government.

At 12:20 p.m. EDT, the 10-year note was down 24/32 to 102 8/32, yielding 4.71%. The 30-year bond was off 1 19/32 at 97 23/32, yielding 5.53%. The 2-year note, which tends to reflect federal interest rates, was unchanged at 101 10/32, yielding 2.93%.

Bond traders worried about growing supply in the market as insurers braced for claims related to last week's terrorist attack on the World Trade Center. The government will also take part in the bailout, leading some participants to worry that the budget will be thrown out of balance. The government canceled its buyback program for September, saying it would resume in October.