The stock market may have rallied Monday after Greece took another step toward a badly needed international bailout, but investors weren't ready to leave the haven of bonds just yet.
Bond prices bounced between small gains and losses as traders appeared skeptical that deep spending cuts would be enough to resolve Greece's debt problems.
The yield on the benchmark 10-year Treasury note remained flat from Friday at 1.98 percent. Its price at the end of the trading day edged slightly higher by 6.2 cents per $100 invested.
The yield on the 30-year Treasury bond also remained flat at 3.13 percent. Its price rose by 30 cents for every $100 invested.
In other trading, the yield on the two-year note also remained flat at 0.28 percent. The three-month T-bill paid a yield of 0.10 percent, up from 0.08 percent.