Reuters Welcome to 10 Things Before the Opening Bell. Sign up here to get this email in your inbox every morning.Here's what you need to know before markets open.1. The US economy doesn't need more fiscal stimulus for a V-shaped recovery, veteran strategist Ed Yardeni says. Republicans and Democrats have been at loggerheads in the US for weeks over the size of the next stimulus plan, but one strategist thinks the US economy is on course for a V-shaped recovery regardless of whether there is another government program2.