Political risk has been rising for the health-care industry of late, but so is love for the group among hedge funds. In a quarter when calls for drug pricing and " Medicare-for-All" grew louder, hedge funds raised their holdings in stocks from drugmakers to health insurers. At the end of March, their exposure increased to the highest since 2010, making the group the most crowded among 11 industries, regulatory filings compiled by RBC Capital Markets showed. Though the worst industry in the S&P 500 this year, health-care has its devotees.