Just two short weeks ago, when Goldman’s head strategist David Kostin announced that on one hand the market’s “stellar return borrowed heavily from the future” and “is now 30%-45% overvalued compared with the average since 1928″, which “logically” led to Kostin’s conclusion that “we lift our year-end 2014 S&P 500 price target to 2050 (from 1900) and 12-month target to 2075, reflecting prospective returns of 4% a