Jan 23 (Reuters) - U.S. equity funds faced outflows in the week through January 21 as ​investors reduced risk exposure on concerns about ‌President Donald Trump's tariff threats against European nations over Greenland. Investors ‌pulled a net $5.26 billion from U.S. equity funds, partly reversing the roughly $28.17 billion of net purchases made the previous week. Trump stepped back from the tariff ⁠threats against eight ‌European countries on Wednesday and ruled out seizing Greenland by force. U.S. lar ...