A Sunday election returned power in Greece to the pro-bailout New Democracy party, but the margin of victory was slim.
As leaders in Greece grind toward forming a coalition government, investors are still left with unanswered questions about Spain and Italy and the spreading lack of confidence in government bonds.
By close of trading on Wall Street, the Dow Jones industrial average shed 25.35 points or 0.2 percent to 12,741.82.
The Nasdaq composite index gained 22.53 points or 0.78 percent to 2,895.33.
The Standard and Poor's 500 added 1.94 points or 0.14 percent to 1,344.78.
On the New York Stock Exchange, 1,756 stocks advanced and 1,255 declined on a volume of 3 billion shares traded.
The benchmark 10-year treasury note rose 1/32 to yield 1.577 percent.
The euro fell to $1.2572 from Friday's $1.264. Against the yen, the dollar rose 79.10 yen from Friday's 78.71 yen.
In Tokyo, the Nikkei 225 index added 1.77 percent, 151.70 points, to 8,721.02.
In London, the FTSE 100 index gained 0.22 percent, 12.28, to 5,491.09.