MINYANVILLE ORIGINAL US equities were on track for another weekly loss as investors continued to fret about the fiscal cliff. Stocks hovered between mild gains and losses while politicians in Washington DC tried to reach a resolution on proposed tax cuts and increases .   “This is the first time we've had one iota of anything constructive being done " said Todd Schoenberger managing principal at the BlackBay Group told Reuters. "That's very positive but you can be flexible and still have us go over the cliff. Wall Street traders remain very nervous and need something concrete to get ...