MINYANVILLE ORIGINAL US stocks fell on this last day of the quarter on data that showed that manufacturing activity in Chicago contracted. The quarter remains positive overall however.   “We had a heck of a good quarter and month for stocks beyond what anyone thought ” Stuart Hoffman chief economist at PNC Financial Services Group told MarketWatch. “So now we’re having a step backward as some of the QE3-inspired gains dissipate.”   The Nasdaq Composite (INDEXNASDAQ:.IXIC) is down 0.48% to 3 121.67 points on average volume of 779.77 million as of 12:09 p.m. EDT.   Cytori Therapeutics (NASDAQ:CYTX) gained ...