In a study of analyst recommendations at the major brokerages, for the underlying components of the S&P 500, NRG Energy Inc (NYSE: NRG) has taken over the #19 spot from Schlumberger Ltd. (NYSE: SLB), according to ETF Channel. Below is a chart of NRG Energy Inc versus Schlumberger Ltd. plotting their respective rank within the S&P 500 over time (NRG plotted in blue; SLB plotted in green):