Financial Times | Morning MoneyBeat: For Investors, Oil's a Double-Edged Sword Wall Street Journal (blog) Morning MoneyBeat is the Journal's pre-market primer packed with market updates, insights and must-read news links. To receive this morning newsletter via email, click here: http://on.wsj.com/MoneyBeatUSSignup. MARKET SNAP: At 06:10 a.m. ET, S&P ... Cheap oil rattles the complacent consensus |