Stocks were mixed on Monday morning, with strong gains in the Consumer Staples, Industrial, and Utility sectors and losses in Technology and Communication Services. Marriott shares fell 3% after the company posted lower-than-expected 1Q earnings, reflecting weak bookings in its core U.S. market. Tyson shares also fell, despite better-than-expected fiscal 2Q results, after management warned that rising costs would weigh on margins in the second half of