Stocks under a cloud as U.S. political tumult adds to growth anxiety

TOKYO (Reuters) - Global stock markets headed into the year-end under a heavy cloud after another rout this week as U.S. political uncertainty added to heightened concerns over slowing global economic growth. Asian equities were shaky on Wednesday following a Christmas eve Wall Street plunge, as investors were unnerved by U.S. political developments including a U.S. federal government shutdown and President Donald Trump's hostile stance towards the Federal Reserve chairman. U.S. Treasury..