talk about a quick return. investors in the linkedin ipo saw the worth of their shares more than double on thursday. the stock priced at $45. it opened at $83 and quickly topped and quickly topped $100 a share. if you sold it high you did very well. only problem is a few of you out there were able to get in on the stock at the beginning. that opportunity is generally limited to big investment funds and their top clients. also a big week for hollywood. broadcast networks unveiled their new primetime lineups and what's known in the tv world and up front week. no schedules announced, programs showcased. advertisers start placing their bids. we all love our favorite tv shows. is this a good opportunity for you to invest in the companies that actually show those shows? matt mckauly, author of "the next great bull market."