NEW YORK (MarketWatch) -- Analysts at Goldman Sachs on Friday predicted that the Standard & Poor's 500 SPX, +1.38% will hit the 1,500 level by the end of 2011. Such a move would represent a 21% total return for investors this year, including a 2% dividend yield, said the Goldman analysts. The analysts posited a three-month target of 1,325 and a six-month target of 1,400. They based their predictions on an expected 5% growth of the U.S economy in 2011 and 8% sales growth. They noted that, while the economy was 16% larger at the end of 2010 than at the end of 2005, the S&P 500 was just 1% above the level of year-end 2005.