During trading today, the Utilities sector (XLU) showed little change while the S&P 500 fell 0.6%.

As a proxy for the sector, the ETF tracked closer to the overall market today than over the past month. Entering today's trading, XLU was up 2.9% over the last thirty trading days while the S&P 500 climbed -2.7%.

Clean Energy Fuels (CLNE) was one of the sector's big losers, as its price dropped 5.7% (-88 cents) to close at $14.56. 2.5 million shares of the stock moved. The stock traded in a range of $14.44 to $15.49. The stock has been on a downward trajectory over the last two months, slipping $6.49 (-30.8%) from a price of $21.05 on March 16, 2012.

Niska Gas Storage Partners (NKA) was a significant gainer in the sector, rising 2.9%. The stock closed at $11.17 with 339,373 shares moving. The stock traded in a range of $10.95 to $11.76. Share price is up $1.88 (20.2%) from $9.29 on April 16, 2012.

NRG Energy (NRG) fell 2.2% to close at $15.72, crossing its 50-day moving average of $15.81. Meanwhile, Boardwalk Pipeline Partners (BWP) climbed 0.2% to close at $27.19, moving past its 200-day moving average of $27.17. Crestwood Midstream Partners (CMLP) rose 1.9% to close at $27.28, cross its 50-day moving average of $26.96 and 200-day moving average of $28.28.

EnerNOC (ENOC) rose 1.7% to close at $5.82, approaching its 50-day moving average of $6.46. It has also moved closer to its 200-day moving average of $8.44. Crosstex Energy (AEE) fell 2.6% to close at $14.43, moving closer to its 50-day moving average of $14.40. Also, the stock moved closer to its 200-day moving average of $31.86.

Chesapeake Midstream Partners L.P (CHKM) hit a new 52-week low today, hitting $23.06 to fall below the previous low of $23.10.