ConocoPhillips (NYSE: COP), the Houston-based oil and gas giant, is scheduled to discuss its third quarter 2009 financial results in a conference call Wednesday at 11:00 AM ET. You can catch the live webcast of the call on the company's website.

During the three months that ended in September, ConocoPhillips, entered a joint venture in Abu Dhabi, upgraded its inventory software, and declared a quarterly dividend. Analysts surveyed by Thomson Reuters expect this integrated energy company to report that earnings plunged 71.7% from a year ago to $0.94 per share. Revenue for the quarter is expected to be 49.5% lower to $35.4 billion, due to weak demand and low prices.

The "Tiber" field discovered by BP in deep water about 250 miles off the coast of Houston is probably the deepest drill on record, more than 6.5 miles. deep. Analysts estimate that the field holds about 3 billion barrels of oil, of which 1 billion barrels are recoverable with today's technology.

BP PLC (NYSE: BP) also owns another big oil field called "Kaskida" in the Gulf of Mexico. Together these two fields could boost BP's oil production from 400,000 barrels per day to 650,000 bpd.

They say you should buy low and sell high, which is easy to say but hard to do. How low is low and how high is high?

Sometimes technical support and resistance levels can be helpful in finding those highs and lows. Right now oil stocks like Exxon Mobil Corp. (NYSE: XOM), PetroChina Company Ltd. (NYSE: PTR) and Chevron Corp. (NYSE: CVX) are just bouncing off support that may be the "low" many traders are looking for.

In his Validea newsletter, editor John Reese picks stocks based on the long-standing strategies of "legendary" investors, including investment stars as Warren Buffett, Peter Lynch, and others known for long-term records of success.

Here, the advisor takes a look at Chevron (NYSE: CVX), based on the investment strategy of leading growth and value investor James O'Shaughnessy.

"O'Shaughnessy's approach, know as the Cornerstone Value Strategy, looks for large, well known companies whose market cap is greater than $1 billion. These companies exhibit solid and stable earnings. CVX's market cap passes this test.

• Jefferies upgraded VMware (NYSE: VMW) to Hold from Underperform on expectations June quarter revenue will be inline-to-slightly-better and negative revisions to September quarter revenue will not be as great as in the most recent two quarters. The firm raised its target on shares to $25 from $20.
  
• Citigroup upgraded Blue Nile (NASDAQ: NILE) to Buy from Hold on valuation following the recent pullback and believes expectations for Q2 are reasonable. The firm has a $50 price target on the stock.
  
• FBR Capital upgraded Bronco Drilling (NASDAQ: BRNC) to Market Perform from Underperform on valuation as it believes negative sentiment will ease. The firm raised its target on shares to $4 from $3.
• Unilever (NYSE: UL) was upgraded to Overweight from Neutral at JP Morgan.
  
• Posco (NYSE: PKX) was upgraded to Overweight from Equal Weight at Morgan Stanley.
  
• Gol Linhas Aereas (NYSE: GOL) was upgraded to Buy from Underperform at BofA/Merrill.

Who said big oil was a dying business? Fortune has released its Global 500, their "annual ranking of the world's largest corporations," and topping the charts is Royal Dutch Shell (NYSE: RDS.A), which, much like a Mariah Carey song, bumped up into the coveted number-one slot after some time at number three. The Netherlands-based oil company trumped its U.S. rival, Exxon Mobil (NYSE: XOM) by $15 billion in sales and saw its revenue spike nearly 29% from 2007.

Speaking of Exxon, the company once again had a tiger in its tank, ranking number two in the world as oil futures bounced around in a nearly $100-dollar range, hitting $146 per barrel at its heights.

The second half of the calendar year has begun, and earnings return to the spotlight this week. As usual, Alcoa Inc. (NYSE: AA) is among the first of the S&P 500 to report quarterly results. For the second quarter in which Alcoa agreed to sell its wire harness and electrical distribution business and its fastening systems business expanded into Morocco, analysts surveyed by Thomson Reuters expect the New York-based aluminum producer to report swinging to a net loss of $0.34 per share from a profit of $0.66 per share in the year-ago period. Second quarter revenue is expected to have fallen 48.3% to $3.9 billion. The full-year forecast is currently for a loss of $1.04 per share and revenue of $16.7 billion (-38.0%). Alcoa has missed expectations in the past three quarters, by as much as 17 cents per share. The long-term EPS growth forecast is 10.0%, which is better than the sector average. Alcoa slashed its dividend earlier this year, and the First Call consensus recommendation remains to hold AA. However, TheStreet.com recommends it as an against-the-grain pick. At $9.86, shares are down 12.4% since the beginning of the year, and recently have been bumping up against the 200-day moving average.