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Crude oil prices showed substantial volatility over the past week. The price increased on Tuesday and from there fell precipitously with a major plunge occurring on Thursday and Friday. Prices for crude closed out at under $100 per barrel. This plunge, combined with the overall decline of the S&P 500, caused prices of integrated oil companies to fall over the past week. As usual, the degree of movement varied by stock.

Statoil (STO) opened at $26.59 on April 30, 2012. The stock closed at $26.00 in after hours trading on May 4, 2012. Stockholders in the company thus incurred a loss of $0.59 per ADR share or 2.22% over the week. Statoil opened at $26.23 on April 9, 2012. This gives the stock a four-week loss of $0.23 or 0.88%.

STO 5-Day Chart

click to enlarge

Source: Fidelity Investments

STO 4-Week Chart

Source: Fidelity Investments

BP plc (BP) opened the week at $43.31. The stock closed at $40.98 in after hours trading on May 4, 2012. This gives BP shareholders a loss of $2.33 or 5.38% over the week, completely erasing last week's gain. BP opened at $43.05 on April 9. Thus, shareholders of BP stock suffered a loss of $2.07 or 4.80% over the four-week period.

BP 5-Day Chart

Source: Fidelity Investments

BP 4-Week Chart

Source: Fidelity Investments

Total S.A. (TOT) opened on April 30, 2012 at $47.91 per share. The stock closed at $46.58 in after hours trading on May 4. Thus, Total shareholders suffered a loss of $1.33 or 2.78% over the week. Total opened on April 9 at $49.66. Thus stockholders have incurred a capital loss of $3.08 or 6.20% over the past four weeks.

TOT 5-Day Chart

Source: Fidelity Investments

TOT 4-Week Chart

Source: Fidelity Investments

Suncor (SU) opened on April 30 at $32.09. The stock closed at $30.35 in after hours trading on May 4. This gives the stock a loss of $1.74 or 5.42% for the week. The stock opened on April 9, 2012 at $30.09. Thus, shareholders of Suncor saw a gain of $0.26 or 0.86% over the four week period. Suncor presented their first quarter results this week and they were quite good. The shares are most definitely undervalued at this level.

SU 5-Day Chart

Source: Fidelity Investments

SU 4-Week Chart

Source: Fidelity Investments

Royal Dutch Shell (RDS.A) opened at $70.55 on April 30. The stock closed at $69.26 in after hours trading on Friday, May 4. This gives shareholders a loss of $1.29 or 1.83% for the week. The stock opened at $68.38 on April 9, 2012. Shareholders thus saw a gain of $0.88 per share or 1.29% over the four-week period.

RDS.A 5-Day Chart

Source: Fidelity Investments

RDS.A 4-Week Chart

Source: Fidelity Investments

Eni (E) opened at $44.54 on April 30. The stock closed at $42.73 in after hours trading on Friday, May 4. This gives shareholders a loss of $1.81 or 4.06% for the week. The stock opened at $44.25 on April 9, 2012. Shareholders thus incurred a loss of $1.52 per share or 3.43% over the four-week period.

E 5-Day Chart

Source: Fidelity Investments

E 4-Week Chart

Source: Fidelity Investments

Royal was the best performing stock this week, although every one of these six stocks saw a loss over the week. Royal Dutch Shell remains the best performing stock over the four week period. Only two stocks of these six saw a share price gain over the four-week period: Royal Dutch Shell and Canadian oil-sands giant Suncor. Suncor was the worst performing company over the past week with BP in a very close second.

Total was the worst performing company over the four week period due largely to the sell-off caused by the company's gas leak at the Elgin field in the North Sea. The market apparently has presented us with an excellent buying opportunity in Suncor over the past week.

Disclosure: I am long BP, SU, STO.

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