Stock futures waver ahead of earnings, Beige Book By: MarketWatch July 28, 2010 at 06:09 AM EDT U.S. stock futures straddle the flatline, as investors await earnings from Boeing and ConocoPhillips. Read More >> Related Stocks: Arcelor Mittal Boeing Co Comcast Corp ConocoPhillips Infineon Tech ADR Newmont Mining Standard & Poors 500 Telefonica S.A. ADR