For example, the aptly named "Buffett Indicator" hit an all-time high last week. This valuation measure, which divides the aggregate value of all publicly traded companies by U.S. gross domestic product (GDP), has averaged a reading of roughly 85% when back-tested to 1970. Last month, it peaked at north of 225%!The catalyst for this net-selling activity looks to be the historical priciness of the stock market.Berkshire Hathaway's quarterly operating results provide to-the-dollar consolidated cash flow state ...