Crude oil prices decreased slightly over the past week. Crude oil prices remained under $100 per barrel similar to where they closed out last week. The S&P 500, meanwhile, declined over the past week although it did close out the week well above the low point that was reached on Wednesday. As usual, the stock prices of the six integrated oil and gas companies that I track in these updates reacted in different ways. For the most part though, they did experience share price declines from last week's levels.

**Statoil** (NYSE:STO) opened at $25.92 on May 7, 2012. The stock closed at $25.74 in after hours trading on May 11, 2012. Stockholders in the company thus incurred a loss of $0.18 per ADR share or 0.69% over the week. Statoil opened at $26.02 on April 16, 2012. This gives the stock a four-week loss of $0.28 or 1.08%. Statoil presented excellent first quarter results earlier this week. The company's stock performance does not appear to be considering the company's double-digit year over year production growth. It is most certainly undervalued at this level.

**STO 5-Day Chart**

*Source for all charts: Fidelity Investments*

**STO 4-Week Chart**

**BP plc** (NYSE:BP) opened the week at $40.99. The stock closed at $39.63 in after hours trading on May 11, 2012. This gives BP shareholders a loss of $1.36 or 3.32% over the week. BP opened at $42.63 on April 16. Thus, shareholders of BP stock suffered a loss of $3.00 or 7.04% over the four-week period.

**BP 5-Day Chart**

**BP 4-Week Chart**

**Total S.A.** (NYSE:TOT) opened on May 7, 2012 at $46.44 per share. The stock closed at $45.21 in after hours trading on May 11. Thus, Total shareholders suffered a loss of $1.23 or 2.65% over the week. Total opened on April 16 at $47.66. Thus stockholders have incurred a capital loss of $2.45 or 5.14% over the past four weeks.

**TOT 5-Day Chart**

**TOT 4-Week Chart**

**Suncor** (NYSE:SU) opened on May 7 at $30.02. The stock closed at $28.85 in after hours trading on May 11. This gives the stock a loss of $1.17 or 4.06% for the week. The stock opened on April 16, 2012 at $30.79. Thus, shareholders of Suncor incurred a loss of $1.94 or 6.30% over the four week period.

**SU 5-Day Chart**

**SU 4-Week Chart**

**Royal Dutch Shell** (NYSE:RDS.A) opened at $68.86 on May 7. The stock closed at $66.87 in after hours trading on Friday, May 11. This gives shareholders a loss of $1.99 or 2.89% for the week. Thus, Royal Dutch Shell is the rare exception in this list. Most of the stocks followed in this series saw lower five-day losses this week than last week. Royal Dutch Shell saw a greater loss than it did last week. The stock opened at $67.83 on April 16, 2012. Shareholders thus incurred a loss of $0.96 per share or 1.42% over the four-week period.

**RDS.A 5-Day Chart**

**RDS.A 4-Week Chart**

**Eni** (NYSE:E) opened at $42.91 on May 7. The stock closed at $43.37 in after hours trading on Friday, May 11. This gives shareholders a gain of $0.46 or 1.07% for the week. Eni was the only one of these six stocks whose share price experienced a gain last week. The stock opened at $43.38 on April 16, 2012. Shareholders thus incurred a loss of $0.01 per share or 0.00% over the four-week period.

**E 5-Day Chart**

**E 4-Week Chart**

Eni was the best performing stock this week and the only one of the six to see a gain this week. Eni was also the best performing stock over the four-week period as it was nearly perfectly flat (only lost one cent!) Canadian oil sands giant Suncor was the worst performing company over the past week despite the company's strong growth prospects. BP was the worst performing company over the four week period with Suncor in a somewhat distant second place.