Treasury yields keep sliding as Europe talks go on Treasury yields are falling as uncertain negotiations about Greece's debt crisis revive fears that a financial contagion will upend the global economy. International lenders on Tuesday delayed a meeting with Greece about reducing employment costs. Greece also needs banks and hedge funds that own its bonds to wipe out some of its debt. Greece must accomplish both goals to obtain its next bailout and avoid default. Its progress was not clear. Traders kept Portugal's borrowing costs near a record high, fearing a wave of European defaults. Money flowed into safe bets such as dollars, German bunds and Treasurys. The yield on the 10-year Treasury note fell to 1.81 percent as of 11:50 a.m. EST from 1.85 percent late Monday.