some big companies falling short on revenue expectations including johnson & johnson, ibm, yahoo and amazon.com. but most companies did come ahead of analyst expectations, apple had a blowout quarter for one, coca-cola, wells fargo, morgan stanley all beating earnings and revenue estimates. as did 3m, caterpillar, at&t, american express, microsoft, all dow components, by the way. meanwhile, federal reserve chairman ben bernanke spooked the marks with the semiannual testimony before the senate banking committee. bernanke said we are seeing, quote, an unusually uncertain economy. he did say though, that he did expect a moderate economy. about bernanke said the federal reserve was prepared to take steps, any steps needed, if the economy did take another leg down. he did not say what those steps would be. chairman bernanke may be concerned about an unusually uncertain economic outlook, but nigh next guest says he feels like the last optimist standing. he isser is me segal, professor of finance at the wharton school and uthor of "stocks for the long run." always great to have you on the program. wel