Los Angeles, CA, 2014-12-15 — /EPR Retail News/ — CBRE Group, Inc. (NYSE:CBG) today announced that Standard & Poor’s Rating Services (S&P) has raised CBRE’s corporate rating to Investment Grade (BBB-), with a positive outlook. This is the second time in six months that S&P has raised its rating of CBRE.  S&P took its latest action under…