thank you. >> ben horowitz with andreessen horowitz in silicon valley. >> just another little stat form our dear friend at standard and poor's, back in 1997, jeff was worth $178 million. today, 15 years later, he controls over 88 million shares, worth $17 billion. pretty sweet. i do think he is -- >> good for you. >> ten minutes before the close right here. we've got a mark off of the lows for sure. >> did you notice a short time ago we showed you radio shack shares hitting a three-year low earlier today. what's behind that price plunge, straight ahead. >> and companies with exposure to facebook. are trading today. back in a moment on "closing bell." >>> mitt romney, born on march 12th, 1947, in detroit, michigan. romney is co-founder and former ceo of bain capital, and former president and ceo of the salt lake winter olympics organizing committee. romney was governor of massachusetts, and shared the republican governor's association. he was a candidate for president in 2008. romney took second place in the south carolina primary. watch cnbc's special coverage of the florida presidenti