The market is currently down, with the Nasdaq decreasing 0.4%, the S&P 500 slipping 0.2% and the Dow down 0.2%.

The Oil and Gas Operations sector (DIG) is up 0.3% on a bad day for the market overall. The biggest movers in the sector are currently:

Company Market Cap Percentage Change
Talisman Energy Inc (NYSE:TLM) $12.07 billion -3.1%
PDC Energy (Nasdaq:PDCE) $953 million +2.9%
Stone (NYSE:SGY) $1.03 billion -2.4%
Whiting (NYSE:WLL) $5.14 billion +2.1%
SM (NYSE:SM) $3.3 billion +1.8%
PetroChina Company Limited (NYSE:PTR) $240.64 billion +1.6%
AmeriGas Partners (NYSE:APU) $3.79 billion +1.6%

Forex Broker Summary: Forex Capital Markets (FXCM)

Currently trading at $11.26 per share, Talisman Energy Inc (NYSE:TLM) has fallen 3.1%. The company's volume for the day so far is one million shares. This is on pace to fall short of yesterday's volume of 3.3 million shares.

Rising 2.9%, PDC Energy (Nasdaq:PDCE) is currently trading at $35.83 per share. The company's volume for the day so far is 448,683 shares, 1.2 times its average over the past three months.

Stone (NYSE:SGY) is trading at $20.97 per share, down 2.4%. So far today, 383,838 shares have changed hands.

Whiting (NYSE:WLL) has risen 2.1% and is currently trading at $41.80 per share. So far today, the company's volume is 851,645 shares, in line with the current daily average.

SM (NYSE:SM) is currently trading at $49.89 per share, a 1.8% increase. So far today, 208,174 shares of the company's stock have changed hands. This is a sign that there will be less trading activity than there was yesterday.

PetroChina Company Limited (NYSE:PTR) is up 1.6% to reach a current price of $133.31 per share. At 71,883 shares, the company's volume so far today is 0.8 times its current three-month average.

AmeriGas Partners (NYSE:APU) has increased to a share price of $41.01, a 1.6% rise. The company is currently trading a volume of 17,450 shares.

The Bottom Line No matter the economic climate, Wall Street will always have stocks that make major moves each week. Daily stock performance should be weighed against historical performance and put in context of the market overall. Keep in mind that all these ratios should be compared against historical numbers and industry information in order to get a more complete picture.