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Faced with array of risks, CEOs increasingly pessimistic

Facing a cocktail of risks from the economic slowdown in China to the rise of the Islamic State group, chief executives around the world are more pessimistic about the global economy than at any time in three years — a development that has the potential to seriously affect their investment and growth plans.

That's the conclusion from a survey of CEOs conducted by consulting and accounting firm PricewaterhouseCoopers, or PwC, during the last quarter of 2015 and released in time for the start of the World Economic Forum in the Swiss ski resort of Davos.

The survey found top executives fretting over a myriad of problems, including over-regulation and cyber security...