San Francisco ChronicleStock futures point to flat open amid "cliff" uncertaintyReutersBy Ryan Vlastelica. NEW YORK | Thu Dec 20, 2012 9:00am EST. NEW YORK (Reuters) - Stock futures pointed to a flat open Thursday amid uncertainty over U.S. fiscal talks as President Barack Obama threatened to veto a controversial Republican plan, ...Stocks May Open Little Changed Amid Focus On Fiscal Cliff - U.S.