Wall Street has started the new year where it ended 2015, with a host of factors unnerving investors. U.S. stocks have fallen 4.2 percent in the last five sessions, and there’s little reason for optimism amidst the international threats and corporate weakness that have prompted accelerated selling.
It may get worse before it improves: shares still are pricey and investors who say they can't calibrate geopolitical woes such as a weakening China and a North Korean hydrogen bomb test
