Nobel Prize-winning economist Joseph Stiglitz said on Monday he is "very uncomfortable" with current stock market levels, arguing they do not equal a strong economic recovery in the United States.

The Dow breached 17,000 points on Thursday before the U.S. markets closed for the long July Fourth weekend. The jump came after the U.S. government reported the economy created a better-than-expected 288,000 jobs in June and the unemployment rate fell to 6.1 percent.