Greece passed the deeply unpopular austerity bill, even as protests and civil unrest spread across the country ahead of the vote. Approval cleared the way for Athens to secure a fresh 130 billion-euro bailout needed to avoid default.

Euro zone finance ministers are scheduled to meet later this week to discuss giving their seal of approval to the bailout ahead of a major Greek bond redemption on March 20.

"The move in Asian time was clearly in response to the Greek vote," said a fund manager at a Japanese life insurance company.

The 10-year Treasury yield rose to 2.00 percent , compared to 1.965 percent in US trading on Friday.

The yield on 30-year Treasuries gained to 3.15 percent from 3.11 percent in US trading.

US Treasuries have been undermined in recent weeks by better-than-expected US economic data, which some investors believe could lead the US Federal Reserve to back off its pledge to keep short-term interest rates near zero through the end of 2014.

Economists polled by Reuters estimate retail sales numbers on Tuesday will show a healthy rise of 0.7 percent in January, or a climb of 0.5 percent if January's robust auto sales are excluded.

Wednesday will bring the release of minutes from the Fed's Jan. 24-25 meeting, which could offer insight into how individual bankers feel about its low-rate pledge.

On the supply side, the Treasury Department completed its $72 billion quarterly refunding last week, which was expected to raise $22.4 billion in fresh funds.

The Federal Reserve also bought $1.39 billion in Treasury Inflation-Protected Securities due in 2028 to 2041, the latest purchases for the US central bank's $400 billion "Operation Twist" aimed to hold down long-term borrowing costs.