Stocks struggle, Snap falls below IPO price, Buffett gives more to charity

Wall Street is searching for direction.  Stock futures are pointing to slight losses at the open as oil prices fall after several banks cut their outlook on crude because of concerns about oversupply.  Yahoo Finance’s Alexis Christoforous, Seana Smith, Melody Hahm and Andy Serwer discuss the day’s top stories, including Snap (SNAP) stock falling below the company’s IPO price, retail rivals trying to get in on Amazon (AMZN) Prime Day and Warren Buffett giving away more Berkshire Hathway (BRK-B) stock to charity.