Hedge fund managers are arguably the celebrity chefs of the money management industry. They are best able to whip up returns that make investors drool. But financial engineers are unpicking their secret sauce and finding new ways to sell it by the bottle. The biggest trend in the money management industry is the shift towards passive investment. About $3tn is now in index-tracking and exchange traded funds that only seek to replicate the returns of a broad market, such as the S&P 500, the Barclays Aggregate bond index or the FTSE 100. The basic return of a market...