In a week that saw the stock market take two sickening dives and then recover, the July 17 guest was William Wolman, chief economist of Business Week, to give his perspective on the market and the economy. Bill Wolman is also a regular commentator on CNBC TV who has been watching the world's markets -- and economies -- for more than 35 years, mostly for BW. And he has had experience in banking and Wall Street.