Wall Street falls on simmering Greece worries, tepid data

U.S. stocks extended losses on Thursday after the International Monetary Fund warned Greece may need a large debt writeoff, and muted U.S. jobs data dampened the economic outlook. IMF's warning comes as Greece readies for a Sunday referendum on an international bailout deal that Prime Minister Alexis Tsipras has urged voters to reject. "The market seems to be paying more attention to what may happen with Greece as well as whether or not wage growth will pick up," said Omar Aguilar