In Europe, the Stoxx 600 Index closed with a 0.2 per cent drop for the day. Earlier in the session, it rose as much as 1.2 per cent, according to Bloomberg News.
US Treasury Secretary Timothy Geithner, who is in Europe for pre-summit discussions, supports the Franco-German plan, according to Reuters.
"I have a lot of confidence in what the president of France and the minister are doing, working with Germany to build a stronger Europe," Geithner told reporters after talks with French Finance Minister Francois Baroin, according to Reuters.
Highlighting the difficulties in the negotiations were reports that Germany rejects proposals to combine current and permanent euro-area rescue funds a day after the Financial Times reported EU leaders may agree on a package including the existing 440 billion euro bailout fund and a new 500 billion euro facility.
The euro fell 0.1 per cent to US$1.3387 at midday trading in New York and declined 0.1 per cent to 104.01 yen.
"You have a lot of uncertainty in the market before the meetings," Fabian Eliasson, head of US currency sales at Mizuho Financial Group in New York, told Bloomberg News. "It really comes down to the next two days. The market has high expectations for this and if the market is disappointed you could see risk being taken off and really strong moves."
Eyes are also on the European Central Bank which meets on Thursday. Most economists expect it to cut interest rates to 1.0 per cent from 1.25 per cent, introduce longer-term liquidity tenders for banks and widen the collateral they can use to borrow from it, according to Reuters.
Meanwhile, other life lines are eagerly taken. The ECB said demand for three-month dollar loans climbed to US$50.7 billion today following last week's agreement with five other central banks to reduce interest rates on such loans. That compares with the US$395 million lent in the last such offering on November 9, according to Bloomberg, and is five times the US$10 billion forecast in a Reuters poll of money market traders.