LONDON, April 16, 2013 /PRNewswire/ --

Oil prices tumbled on Monday as commodities came under pressure following disappointing Chinese GDP data. China, the world's fastest growing major economy, grew 7.7% in the first quarter, which is below the consensus forecast. The weak Chinese GDP data was followed by some disappointing U.S. economy data. With the world's two largest oil consumers showing signs of slowdown, oil prices are expected to remain under pressure. This does not augur well for oil & gas drilling & exploration companies such as SandRidge Energy Inc. (NYSE: SD), Magnum Hunter Resources Corp. (NYSE: MHR), Transocean Ltd. (NYSE: RIG), and Pioneer Southwest Energy Partners L.P. (NYSE: PSE). Shares of all four companies edged lower on Monday, tracking losses in the broad market. StockCall free coverage on SD, MHR, RIG, and PSE is available upon registration at

http://www.stockcall.com/register

Shares of SandRidge Energy Inc. were among the major losers in the oil and gas sector on Monday. The stock ended the day 4.95% lower at $4.80 on volume of 9.62 million, taking its losses in the last three trading sessions to over 7.50%. SandRidge's shares touched an intra-day low of $4.79 yesterday, and are currently trading close to their 52-week low of $4.76. The stock currently has support at around $4.75. Year-to-date, the company's shares have fallen more than 24% so far in 2013, underperforming the broad market. Download the free technical research on SD by signing up at

http://www.StockCall.com/SD041613.pdf

Shares of Magnum Hunter Resources Corp. tumbled yesterday. The stock closed 11.41% lower at $3.34 on above average volume of 10.07 million. Magnum Hunter Resources' shares have fallen 14.80% in the last three trading sessions. The stock touched a 52-week low of $3.28 on Monday. Shares of MHR are also trading well below their 50-day and 200-day moving averages, which is a bearish signal. The stock has fallen nearly 16.30% so far in 2013, compared to a gain of 8.80% for the S&P 500. Register now and get access to the free analysis on MHR at

http://www.StockCall.com/MHR041613.pdf

Another major loser in the oil and sector on Monday was Transocean Ltd. The company's shares fell 3.33% to finish the day at $48.83 on above average volume of 3.32 million. Transocean's shares have fallen nearly 5% in the last three trading sessions. Despite the recent losses, the stock is still up more than 9.30% for the year, outperforming the S&P 500. The company's shares are trading nearly 18% below their 52-week high. The stock is currently trading below its 50-day and 200-day moving averages. Sign up and read the complimentary report on RIG at

http://www.StockCall.com/RIG041613.pdf

Shares of Pioneer Southwest Energy Partners L.P. also struggled on Monday. The stock fell to an intra-day low of $24.79 before finishing the day 2.51% lower at $24.81 on above average volume of 7.44 million. Pioneer Southwest Energy's shares are currently trading above their 50-day and 200-day moving averages. Year-to-date, the stock has gained more than 11.50%, compared to a gain of over 8.80% for the S&P 500. The stock's MACD chart, however, suggests that market sentiment has turned bearish. The free report on PSE can be downloaded by signing up now at

http://www.StockCall.com/PSE041613.pdf

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