>>michele markey thanks so much. >>thank you. coming up...chart talk - and the impact of drought on some stocks. and after this, the new investment strategy tool. social media - it's not just for sharing pictures & gossip. ♪ ♪ ♪ ♪ ♪ elaine: it was 17 years ago when i decided to become a mentor ♪ that i was assigned to christina. when she was in the first grade, she was a shy little girl, not able to smile much. christina: elaine showed me there were people out there to help me and guide me through life. when elaine let me read her diary, i didn't even realize how important i was to her, and now that i'm mentoring, i feel that same importance, and i can spread those same values to the girls i mentor. be someone who matters, to someone who matters. social media has transformed from a fun way to share pictures with your friends to a sophisticated method for companies to shape their image.here's the story of one firm that's taking it a step further.diane moca reports. far from silicon valley... chicago-based social market analytics h