Health care stocks showed strength Thursday after the Supreme Court upheld subsidies under the Affordable Care Act, aka ObamaCare (see A1 story). Shares of hospital operator Community Health Systems (CYH) roared back from early weakness and surged 7.17, or 13% to 62.45. The stock blew past a 57.82 buy point of a consolidation that goes back to September and scored a record high. Turnover swelled more than seven times above average.