Alcoa surges as U.S., U.K. slap sanctions on using Russian metals on exchanges (NYSE:AA)
Sean Gallup/Getty Images News Alcoa (NYSE:AA) +5.9% and Century Aluminum (CENX) +4.8% post-market Friday after the U.S. and U.K. announced new restrictions on trading in Russian aluminum, copper and nickel in an effort to hurt Vladimir…