The Energy sector (XLE) held steady on a trading day that saw S&P 500 drop 1.5%.

Canadian Natural Resource (CNQ) was one of the sector's big losers, as its price dropped 7.5% (-$2.36) to close at $28.98. 5.1 million shares of the stock moved. The stock traded in a range of $28.90 to $30.58. The stock has lost momentum over the last three months, losing $7.80 (-21.2%) from $36.78 on March 2, 2012.

Synthesis Energy Systems (SYMX) was a significant gainer in the sector, rising 5.6%. The stock closed at 89 cents with 22,232 shares moving. The stock traded in a range of 88 cents to 95 cents.

EOG Resources (EOG) declined 3.7% to close at $100.99, moving below its 50-day moving average of $104.20 and 200-day moving average of $104.54. Blueknight Energy Partners L.P (BKEP) rose 1.6% to close at $6.98, crossing its 50-day moving average of $6.91.

Magellan Petroleum Corporation (MPET) rose 2.7% to close at $1.14, approaching its 50-day moving average of $1.20. It has also moved closer to its 200-day moving average of $1.18.