Stocks ended mixed on Monday after a day of choppy trading, following the election in Greece which yielded a win for the pro-bailout party.

While that was an initial positive for the markets, Greece's economy is far from out of the woods, and Europe's debt crisis is still hitting other sovereign nations hard.

"The Greek election is the lack of a negative," said Peter Boockvar, an equity strategist at Miller Tabak. "I won't call it a positive though."

Spain's 10-year yield moved back up above 7%, raising worries about that country's ability to stave off a bailout.

With meetings of the Group of 20 and the Federal Reserve on tap this week, investors are wary of making any big bets. Trading volume remained light Monday, according to several market watchers.

The Dow Jones industrial average shed 25 points, or 0.2%. The S&P 500 gained 2 points, or 0.1%. The Nasdaq added 23 points, or 0.8%.

There had been worries ahead of the weekend that a victory by austerity opponents would lead to a Greek debt default and a potential breaking up of the eurozone.

At the same time, investors think the Fed might announce another round of bond buying or plans to continue its so-called Operation Twist at the close of its two-day meeting Wednesday. And that could prop up stocks in the short term.

"The environment is paralyzing decision making," said Boockvar. "Every day there's some policy or political event that investors are waiting on to decide whether to take risk up or down."

U.S. stocks rose Friday, with all three indexes ending a second straight week with gains.