Wall Street analysts are particularly bullish on technology stocks and materials stocks.The S&P 500 (^GSPC 0.35%) includes companies from 11 stock market sectors. By aggregating the median target prices on each company, FactSet Research constructs a bottom-up forecast for each market sector. In the next year, Wall Street expects the most upside in information technology (21%) and materials (18%) as of Dec. 5.Investors can get exposure to those market sectors by purchasing shares of the Vanguard Information ...