vivus' treatment was rejected by the panel in july, but it has no partner. that stock was up almost 11%. and that is tonight's "market focus." >> tom: while the job market may be weak, a record number of older americans are working. last month, more than 28 million americans 55 years old and over had jobs. this goes for c.e.o.'s too. warren buffett just turned 80, and continues running berkshire hathaway. the average age of people who sit on a fortune 500 corporate board of directors is 63.5, according to the corporate library. bob damon is president of north america for executive recruiting firm korn ferry. bob, welcome to nightly business report. >> tom, thank you very much. good to be here. >> tom: so are older c.e.o.s more in demand these days? >> yeah, tom, we've seen a market increase in the demand for what we like to call seasoned c.e.o.s. in fact, there's a kind of a saying in the boardroom today that 60 is the new 50. >> tom: fair enough. and three factors have been driving this, according to your research. the complexity of the business, things are