The Health Care sector (XLV) held steady on a trading day that saw S&P 500 drop 1.3%.

The ETF, as a proxy for the sector, tracked closer to the overall market today than over the past month. Entering today's trading, XLV was down 2.1% over the last thirty trading days while the S&P 500 climbed -3.4%.

Rosetta Genomics (ROSG) was one of the sector's big losers, as its price dropped 9.9% (-$1.12) to close at $10.18. 544,797 shares of the stock moved. The stock traded between $10.10 and $11.53.

Ampio Pharmaceuticals (AMPE) was a major gainer in the sector, rising 8.7% (+28 cents) to close at $3.48 with 1.6 million shares moving. The stock traded in a range of $3.36 to $3.99. The stock has been on the rise in the last two months, up 67 cents (23.8%) from a price of $2.81 on April 12, 2012.

Community Health Systems (CYH) rose 5.1% to close at $23.32, cross its 50-day moving average of $22.52 and 200-day moving average of $21.26. Cubist Pharmaceuticals (CBST) declined 2.9% to close at $40.14, moving below its 50-day moving average of $41.03 and 200-day moving average of $40.74.

Tornier N.V (TRNX) rose 5% to close at $21.61, approaching its 50-day moving average of $21.77. It has also moved closer to its 200-day moving average of $21.68. Vertex Pharmaceuticals Incorporated (LHCG) fell 3.7% to close at $54.90, moving closer to its 50-day moving average of $54.31. Also, the stock moved closer to its 200-day moving average of $16.65.