U.S. stocks struggle for direction as G-20 summit gets under way

Stocks choppy here as traders look ahead to Trump’s big meeting with China’s Xi at the G20. Plus – GE slashed on the street as the conglomerate faces more bad news. It’s the call of the day. And – Sheryl the knife? – Facebook’s Sandberg getting her hands dirty going after enemies. What’s next for Facebook at war. Plus – Why some cannabis companies may be against federal legislation – we have the answer. Catch The Final Round at 3:00 p.m. ET with Jen Rogers, Yahoo Finance’s Editor-in-Chief Andy Serwer and markets correspondent Myles Udland.