Value

FT.com / Columnists / Martin Wolf - How mistaken ideas helped to bring the economy down

Mr Smithers proposes two fundamental measures of value – “Q” or the valuation ratio, which relates the market value of stocks to the net worth of companies and the cyclically adjusted price-earnings ratio, which relates current market value to a 10-year moving average of past real earnings. The two measures give similar results (see chart). Professional managers use many other valuation methods, all of them false. As Mr Smithers remarks sardonically: “Invalid approaches to value typically belong to the world of stockbrokers and investment bankers whose aim is the pursuit of commission rather than the pursuit of truth.”

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