McDonald's will have to prove that it is not a one-trick...

McDonald's will have to prove that it is not a one-trick pony in terms of its sales trends. Europe is getting better. This is a market that's almost as strong as the U.S. and accounts for as much as 40 percent of profits. But psychologically for investors, the U.S. market has to continue to do well in order for the stock to hold up.