AOL Inc. rose sharply after RBC Capital Markets reassessed the Web publisher’s stock. AOL owns the Huffington Post and TechCrunch. RBC raised its rating to “outperform” (the equivalent of “buy”) from “sector perform.” AOL reported fourth-quarter earnings and sales that beat analysts’ ­estimates on improved advertising performance. According to a Dow Jones report, RBC ­altered its rating in part because of a revenue turnaround “that has only just begun.”