Sen. Bernie Sanders spooks healthcare stocks as Trump teaches investors to expect the unexpected

Wall Street sees the chances of the U.S. shifting to a government-run health-care system as incredibly slim. But unpredictable politics over the last three years has investors worried and punishing health-care stocks all the same. Health care is the worst-performing sector in the S&P 500 this year as Sen. Bernie Sanders, D-Vermont, and other presidential hopefuls push “Medicare for All,” a plan to replace private health insurance with public coverage, as part of their 2020 campaigns.