During trading today, the Health Care sector (XLV) showed little change while the S&P 500 fell 0.9%.

The ETF, as a as a proxy for sector performance, was down today, but still tracked closer to the overall market than over the past week. Going into trading today, XLV was down 3.4% over the last seven trading days while the S&P 500 was down 1.8%.

Elan Corporation plc (ELN) was a major loser in the sector. Its price dropped 14.7% (-$1.99) to close at $11.52, as 21.1 million shares moved. The stock traded between $11.40 and $12.08. The share price has been falling in the last month, down $2.76 (-19.3%) from $14.28 on June 22, 2012.

Cynosure (CYNO) was a significant gainer in the sector, rising 10.9%. The stock closed at $23.86 with 530,058 shares moving. The stock traded in a range of $23.39 to $24.84. Share price is up $4.35 (22.3%) from $19.51 on June 22, 2012. Centene (CNC) also gained today, climbing $2.12 (+6.1%) to close at $36.76.

XenoPort (XNPT) rose 6.6% to close at $6.43, cross its 50-day moving average of $6.08 and 200-day moving average of $5.07. Amedisys (AMED) declined 6.7% to close at $12.16, moving below its 50-day moving average of $12.39 and 200-day moving average of $12.27.

Dendreon Corporation (DNDN) rose 4.9% to close at $6.51, approaching its 50-day moving average of $6.87. It has also moved closer to its 200-day moving average of $9.23. Edwards Lifesciences (NEOG) fell 1.8% to close at $98.65, moving closer to its 50-day moving average of $98.53. Also, the stock moved closer to its 200-day moving average of $38.80.

InterMune (ITMN) hit a new 52-week low today, hitting $9.01 to fall below the previous low of $9.66.