The Hidden deal Duff & Phelps Corp. (NYSE: DUF) is up 19.7% at $15.62. The investment bank is being acquired by a consortium including The Carlyle Group LP (NASDAQ: CG) for about $661 million. More coverage here. Read more: 24/7 Wall St. Closing Bell — December 31, 2012: Markets Close 2012 on Upbeat Note (FB, ICE, BMY, AMRS, DUF, CG, ALJ, ALDW) - 24/7 Wall St. http://247wallst.com/2012/12/31/247-wall-st-closing-bell-december-31-2012-markets-close-2012-on-upbeat-note-fb-ice-bmy-amrs-duf-cg-alj-aldw/#ixzz2GfVYPYtm