Wall Street stocks closed higher on Monday and the S&P 500 was poised to clinch its biggest quarterly percentage gain since 1998 as investors hoped for a stimulus-backed economic rebound, while a surge in Boeing shares helped boost the blue-chip Dow.
The planemaker's <BA.N> shares jumped more than 14% after a 737 MAX took off on Monday from a Seattle-area airport on the first day of certification flight testing with U.S. Federal Aviation Administration and company test pilots, a crucial moment in Boeing's worst-ever crisis.
