NEW YORK ( TheStreet) -- TransAtlantic Petroleum ( TAT), Frontline ( FRO) and YPF SA ( YPF) showed strength this past week, whereas Niska Gas Storage Partners ( NKA), Trina Solar ( TSL) and Renesola ( SOL) pared losses.

TransAtlantic Petroleum was the top gainer, jumping 47.2% at close this past week, after reporting 71.4% increase in third-quarter sales to $32.0 million from the year-ago quarter. Net loss for the quarter narrowed to $328,000 from $11.8 million in the prior-year quarter. Daily average sales recorded 74% surge compared to the year-ago quarter and 25% increase over the prior quarter.

Frontline climbed 35.2% on signs of stronger demand to charter the largest crude oil carriers. Bookings of very large crude oil carriers (VLCCs) to load oil in the Persian Gulf reached 137 from the previous high of 129 in April, leading to spikes in the stock's price. Charter rates on the benchmark trade route commencing from the Gulf rose the most this past week since February.

YPF SA accumulated 15% at close last week. Repsol YPF's controller is planning to invest $400 million next year in Argentina to develop new oil deposits in Neuquen province. In addition, the company went ex-dividend on Nov.9, making shareholders eligible for a dividend of $1.68 per share.

CGG Veritas ( CGV) advanced 11.9% at close last week. The company announced strong third quarter 2011 results with revenue of $797 million, up 21% from $656 million in the year-ago quarter. The company swung to net income of $41 million from a net loss of $33 million in the same quarter last year.

Exterran Holding ( EXH) moved up 7.8% after receiving a rating upgrade to neutral from underperform at Zacks Investment research.

Key Energy Services ( KEG) and Nabors Industries ( NBR) appreciated 7.1% each. Last week, Dahlman Rose upgraded Nabors to buy from an earlier hold rating. Currently, the stock has a price target of $30.

Among losers, Niska Gas Storage Partners was at the helm last week, down 12.4% because of selling pressure following unfavorable quarterly results. Additionally, Barclays Capital has downgraded the stock to underweight from its earlier equal weight rating.

Solar stocks Trina Solar and Renesola followed, each losing 10.1%. Trina Solar was downgraded to sell from buy at Maxim Group. Currently, the stock's price target is $5. Renesola anticipates negative gross profit margin and negative income for the third quarter and will announce results on Nov. 23, 2011.

JA Solar Holdings ( JASO) lost 9% last week. U.S. Department of Commerce is investigating a trade complaint by seven domestic solar PV makers alleging China's solar PV modules manufacturers of dumping goods in the U.S. market at less than the cost of manufacturing triggered this decline.

Bristow Group ( BRS) lost 7.6% after reporting operating income of $44 million in the Sep. 2011 quarter, vs. $53.6 million in the same quarter last year.

SandRidge Energy ( SD) shed 7.6% at close last week after Goldman Sachs analysts downgraded the stock to sell from neutral, lowering the price target to $7 from the previous $8.

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