Apple stock heads for best four days since 2014; short sellers flee

Apple extended its Wall Street rally on Thursday, with enthusiasm over demand for its newest iPhone putting the stock on track for its strongest four-day streak in over two years and clobbering short sellers who bet against it. The newest fuel was Apple's announcement late on Wednesday that initial quantities of the iPhone 7 Plus have sold out globally. If the stock stays at that level through the end of the session, it will be its strongest four-day percentage increase since April 2014, when Ap