Kraft Heinz's shares lost a fifth of their value after the company revealed a quadruple-whammy of bad news: it's being investigated by the SEC over accounting issues; it's had to write down the value of the Kraft and Oscar Mayer brands by $15 billion; it's posted a $12.6 billion loss; and its dividend is now 36% lighter. Seems the 2015 merger did not provide the anticipated efficiencies. Fortune