MINYANVILLE ORIGINAL With uncertainty over the fiscal cliff talks still heavy in the air investors stayed cautious on the final trading day of the month with US equities staying mostly unchanged from Thursday’s closing levels.   "The stakes are so high and voters are so frustrated that a deal must be done " said Leo Kelly managing director and partner at HighTower Kelly Wealth Management of the discussions between Congress and the White House on a budget deal to avert a series of tax hikes and spending cuts set to begin at the start of 2013 according to TheStreet. ...