The nightmare scenario for health insurers, a "Medicare for All" system like the one Representative Dennis Kucinich envisioned in his 2005 bill, could put many of these companies out of business. On the other hand, the U.S. automobile industry and other sectors consider the end of company-sponsored health care the route to international competitiveness.
The C-rated ProShares UltraShort Health Care Fund (RXD), which bets on falling stocks, advanced 17%.
Two Rydex ETFs lacked trading activity on Feb. 19, so comparable return data isn't available. But based on the funds' net asset values, the Rydex Inverse 2X S&P Select Sector Health Care ETF (RHO) gained 18%, while the bullish equivalent, Rydex 2X S&P Select Sector Health Care ETF (RHM) lost 17%. These 200% leveraged funds would have been the best- and worst-performing health-care funds last week.Until the uncertainty surrounding the health-care system is resolved, the outlook for health and biotechnology shares and the funds that hold them remains murky. For more information, check out an explanation of our ratings.