Banks, Fed, earnings, flu in view

U.S. stocks may run into some turbulence this week as the impending release of bank "stress test" results, a Federal Reserve meeting and a flood of earnings give investors reasons for caution.

Fears of a global swine flu pandemic developed into another factor to watch over the weekend with new infections in the United States and Canada discovered on Sunday, and as millions of Mexicans hid indoors to avoid a virus that has already killed up to 81 people.