By Karen Brettell NEW YORK (Reuters) – The dollar hit a 20-year high against a basket of currencies on Thursday as a sharp stocks selloff boosted demand for the safe-haven currency and as the Federal Reserve was seen as tightening monetary policy more than peers. Stocks tumbled on Thursday as investors fretted the Fed might need to take more drastic action to bring inflation under control. The greenback dropped on Wednesday, and stocks gained, after Fed Chair Jerome Powell told reporters that policymakers were not actively considering 75-basis-point moves in the future. It came after the U.S. …