The Utilities sector (XLU) held steady on a trading day that saw S&P 500 drop 0.7%.

The ETF, as a proxy for the sector, tracked closer to the overall market today than over the past month. As trading began today, XLU was up 2.5% over the last thirty trading days, and the S&P 500 climbed 1.2%.

Aqua America (WTR) was a major loser in the sector, falling 3.9% (-$1.03) to close at $25.64 with 1.7 million shares moving. The stock traded between $24.80 and $26.16. The stock has risen $3.28 (14.7%) over the last three months from a price of $22.36 on May 3, 2012.

DCP Midstream Partners (DPM) was a significant gainer in the sector, rising 3.7%. The stock closed at $42.63 with 147,018 shares moving. The stock traded in a range of $41.11 to $42.64. Shares are up over the last two months, having risen $5.07 (13.5%) from a price of $37.56 on June 1, 2012.

Oneok (OKE) declined 1.9% to close at $44.51, moving below its 50-day moving average of $44.75 and 200-day moving average of $68.73. Huaneng Power International (HNP) rose 1.1% to close at $28.57, crossing its 50-day moving average of $28.34.

Empresa Nacional de Electricidad (EOC) rose 1.5% to close at $49.99, approaching its 50-day moving average of $50.82. It has also moved closer to its 200-day moving average of $50.64. Calpine Corporation (CPN) fell 3.2% to close at $17.09, moving closer to its 50-day moving average of $16.94. Also, the stock moved closer to its 200-day moving average of $16.72.