Definitely not-for-the-squeamish Delta Air Line's (DAL) stock has plunged in bear-hug fashion during the winter to $9.80 from $14.70, and is now dangerously close to the sell/stop loss at $8.

Delta Air Lines, first discussed here on July 19, 2010, at a price of $10.73, would likely have been a leader of a rejuvenated airline sector until Middle East unrest, including the ongoing civil war in Libya, sent oil prices above $105 per barrel. That crude surge has pushed jet fuel prices -- typically the second biggest or biggest expense for an airline -- substantially higher.

The U.S. airline sector, aided by decreased capacity from mergers, is on course to record one of its best years in many, and Delta Air Lines (DAL), first discussed here on July 19, 2010, at a price of $10.73, may be the leader of the pack.

Nevertheless, keep in mind that I consider Delta to be a high-risk stock not suitable for moderate-risk or low-risk investors. Don't consider DAL if you can't tolerate a 30% to 50% drop in the stock's price: it could happen.

In fact, Delta's share have declined about 22% since hitting highs near $14.70 last autumn; the pullback follows a rise from about $9.50.

Delta Air Lines (DAL) CEO Richard Anderson recently made a cool $1.3 million by selling 100,000 shares of his company's stock at an average price of $13.47 per share. Obviously, this was a nice payday for Anderson, but should this stock sale be a red flag for Delta investors?

Analysts and traders love to watch insider stock transactions because they believe it will give them insight into the health of the company. If insiders are buying stock in their own company, it is viewed as a bullish sign for the company. If insiders are selling stock in their own company, it is often viewed as a bearish sign for the company. After all, who has more information about how well the company is doing than the CEO or some other member of senior management, right?

Unfortunately, it's not that cut and dry.

Delta Air Lines Inc. (DAL) said Thursday that it was one step closer to completing its merger with Northwest Airlines, which will create the world's largest air line by passenger traffic.

The two carriers received Federal Aviation Administration (FAA) authorization to operate as a single carrier. They can now fully combine flight numbers, schedules and ticketing under the Delta name. The air lines have already integrated many operating procedures, including the use common technical manuals.

Delta Air Lines (NYSE: DAL) was on the upswing Monday after the firm raised its forecast for third-quarter margins. The airline issue now expects operating margin of 3% to 4% for the current quarter, compared to its midsummer outlook of 1% to 3%. Third-quarter fuel prices are now expected to average $2.14 per gallon, down from a prior prediction of $2.17.

The update comes courtesy of a regulatory filing, wherein Delta noted that many of its financial metrics are improving on both a sequential and a year-over-year basis. Load factor for September and October is pegged at 82%, narrowly above last year's level. Meanwhile, revenue per available seat mile is expected to decline in the third quarter, but less so than in the second quarter.

Continental Airlines (NYSE: CAL) just got the relief it needs to compete. Despite resistance from the Department of Justice (which can only recommend), the Department of Transportation has granted the airline immunity from antitrust laws. This clears the way for Continental to work with United Airlines (NASDAQ: UAUA) -- and other carriers -- on international routes. Now, the airline can join Star Alliance, which already has antitrust immunity.

At the same time, DOT approved a joint venture among Continental, United, Lufthansa (OTC: DLAKY) and Air Canada. This new relationship would involve trans-Atlantic routes.

Analyst upgrades:

• Citigroup upgraded Adtran (NASDAQ: ADTN) to Buy from Hold on expectations the company will benefit from the broadband Stimulus funds.
• Morgan Stanley upgraded Continental Airlines (NYSE: CAL) to Overweight from Equal Weight based on relative valuation and views the company as a "survivor." Additionally, the analyst lowered 2009 industry estimates but believes it is the last cut for the year and is incrementally more positive on the sector.
• Morgan Stanley also upgraded EXFO Electro-Optical (NASDAQ: EXFO) to Overweight from Market Weight based on valuation.
• Tata Motors (NYSE: TTM) was upgraded to Buy from Hold at Deutsche Bank.
• Ascent Solar (NASDAQ: ASTI) was upgraded to Neutral from Underweight at JP Morgan.
• Mechel Steel (NYSE: MTL) was upgraded to Neutral from Underperform at Credit Suisse.

Continental Airlines (NYSE: CAL) is seeking immunity from antitrust laws to work more closely with United Airlines (NASDAQ: UAUA) and others on international routes. And, since airlines operate in a state of seemingly perpetual turmoil, what's the harm? According to the Justice Department: plenty.

The airline sought broad immunity as part of an effort to join Star Alliance, which includes US Airways, Lufthansa (OTC: DLAKY), and Air Canada -- along with United. Continental believes that it needs to join Star Alliance in order to remain competitive, especially with airlines that have this type of immunity already.

Delta may still be ready when you are, but in 2009 they're not going to be as big.

Citing the global recession, Delta (NYSE: DAL) announced that it will cut an additional 6-8% of capacity in 2009. The move will result in an up to 10% reduction in domestic capacity, when one includes the impact of previously-announced operational cuts. Delta also said it will eliminate an undetermined number of jobs.

Shares of Delta (NYSE: DAL) rose 52 cents to $8.48 on Tuesday at mid-day amid a broader market rally.

Delta, which recently merged with Northwest to become the world's largest airline, said it will offer "voluntary programs" to decrease the size of its workforce. Delta President Ed Bastian called the cuts "dramatic" and said total seat capacity, domestic and international, over the two-year, 2008-2009 period, will be reduced by 20% -- a required step, due to the downturn in both business and leisure travel, The Wall Street Journal reported.

Few actors understand the pluses and minuses of hedging better than traders . . . and airlines. In an ironic twist, some airlines could be financially hurt by falling oil prices. That's right: hurt by falling oil prices.

United Airlines (NYSE: UAUA) is one such airline. United said it could lose up to $294 million in Q3 if oil prices average $95 per barrel, marketwatch.com reported Wednesday. Oil rose $2.44 to $109.05 in mid-day Wednesday trading. United purchased fuel caps averaging around $111 per barrel this year and $118 for 2009. In other words, the caps mean United would be compelled to pay more for oil than the market price, due to the established contracts.

American Airlines (NYSE: AMR), and the slated-to-merge Northwest Airlines (NYSE: NWA) / Delta Air Lines (NYSE: DAL) are other carriers that could be hurt by oil hedges, marketwatch.com reported.

Hedges, caps: An attempt to create fixed expenses

Stock Analyst C. Leonard Bauer told BloggingStocks Wednesday most airlines "merely seek to break even with their fuel hedges and caps, not profit from them."

"If there's one sector that stands to benefit handsomely from a further slide in oil or, at least, a moderation in crude's rally: the airlines," explains energy sector expert Elliott Gue.

In The Energy Strategist, he says, "Airlines may make a terrible long-term investment but can be an outstanding short-term trade." Here he looks at Delta Air Lines (NYSE: DAL) and, for the even more speculatively-inclined, US Airways (NYSE: LCC).

"Some investors will rightfully cringe from any mention of this sector; after all, the airlines have consistently lost money throughout their post-deregulation history.

"Most of the majors have declared bankruptcy on multiple occasions since that time. However, we've traded the airlines on a few occasions; we took some triple-digit percentage gains in the airlines back in 2005.

"The airlines' leverage to oil prices is well known. Expectations are so low, in fact, that several major air carriers actually managed to beat consensus expectations in the second quarter.

"And although sentiment is already at rock-bottom, there's a real basis for cautious optimism. First, if I'm right about oil, fuel costs won't rise appreciably in the third quarter. This huge headwind is dissipating.

As the second quarter earnings crunch begins in earnest this week, the bear market has investors jittery and prognosticators spinning out dire warnings. In the wake of mixed results from Alcoa (NYSE: AA) and General Electric (NYSE: GE) kicking things off last week, here's a look at what Wall Street is expecting from many of the companies scheduled to report this coming week.

Analysts surveyed by Thomson Financial are expecting the following companies to report a rise in earnings when compared to the same period of the previous year.

• Nucor Corp. (NYSE: NUE): $1.80 EPS (36.6%) on sales of $6.4 billion (+53.0%)
• Google Inc. (NASDAQ: GOOG): $4.74 EPS (24.9%) on sales of $3.9 billion (+41.6%)
• Nokia Corp. (NYSE: NOK): 56 cents EPS (23.2%) on sales of $19.9 billion (+17.8%)
• CSX Corp. (NYSE: CSX): 90 cents EPS (21.1%) on sales of $2.9 billion (+12.8%)
• Altera Corp. (NASDAQ: ALTR): 27 cents EPS (18.5%) on sales of $346.7 million (+8.4%)
• IBM (NYSE: IBM): $1.82 EPS (+17.6%) on sales of $25.9 billion (+9.0%)
• eBay Inc. (NASDAQ: EBAY): 41 cents EPS (17.1%) on sales of $2.2 billion (+18.0%)
• W.W. Grainger Inc. (NYSE: GWW): $1.46 EPS (17.1%) on sales of $1.7 billion (+8.0%)
• Microsoft Corp. (NASDAQ: MSFT): 47 cents EPS (17.0%) on sales of $15.7 billion (+17.0%)
• Honeywell International Inc. (NYSE: HON): 94 cents EPS (17.0%) on sales of $9.2 billion (+7.9%)

MAJOR PAPERS:

• Corporate advertisers are not flocking to YouTube despite the fact that the video sharing site attracts one billion views a day, upsetting Google Inc's (NASDAQ: GOOG) expectations for a strong revenue stream, according to the Wall Street Journal. Total ad revenue for Google this year will be about $200M from the site, where the company is counting on growth beyond its text ads from Web searches.
• A day after Microsoft Corporation (NASDAQ: MSFT) said it would be interested in reopening talks to acquire some of all of Yahoo! Inc (NASDAQ: YHOO) if Carl Icahn's proxy battle succeeds, the Wall Street Journal reported that Yahoo! CEO Jerry Yang accused Microsoft of "trying to destabilize" the company "without a real desire to complete a deal".

OTHER PAPERS:

• The Atlanta Journal Constitution reported that Comair, a subsidiary of Delta Air Lines Inc (NYSE: DAL), is set to cut 300 pilots and 220 flight attendants from its staff. The paper said the layoffs will go into effect in September when Comair cuts its flight schedule as part of Delta's capacity cuts and will affect crew members based at Cincinnati/Northern Kentucky International Airport and New York's John F. Kennedy International Airport.

WEB SITES:

• Iran successfully test-launched a long-range version of its Shahab-3 missile, according to Iranian news service Al-Alam. The missile can reach U.S. military bases in the Persian Gulf and Israel.

MAJOR PAPERS:

• According to people familiar with the matter, the Wall Street Journal reported that home-furnishings retailer Linens 'n Things, acquired by Apollo Management in 2006 and caught by a shrinking housing market and increasing debt load, is expected to file for Chapter 11 bankruptcy-court protection by Tuesday.

OTHER PAPERS:

• The Detroit News reported that Delta Air Lines Inc (NYSE: DAL) pilots have agreed to a contract revision that clears the way for Delta and Northwest Airlines Corporation (NYSE: NWA) to announce a merger next week, according to sources close the matter.
• The United Auto Workers union notified General Motors Corporation (NYSE: GM) of its deadline to strike three factories in Michigan if the two are unable to agree on local labor pacts, the Detroit News reported.
• The Business Standard reported that Toyota Motor Corporation (NYSE: TM) is planning to invest Rs 1,400 crore in Toyota Kirloskar Motor, its India subsidiary to set up its second plant in the country.

MAJOR PAPERS:

• Troubled savings and loan giant Washington Mutual Incorporated (NYSE: WM) will receive a $5B investment from private equity firm TPG and other investors, the Wall Street Journal reported. For now, this eliminates the possibility that it will be acquired by another financial institution such as J.P. Morgan Chase & Co (NYSE: JPM).
• The Wall Street Journal also reported that music downloading copyright infringement lawsuits against Baidu.com Inc (NASDAQ: BIDU) and Sohu.com Inc (NASDAQ: SOHU) may be heard by a Chinese court.
• People close to the situation said that Delta Air Lines Inc (NYSE: DAL) and Northwest Airlines Corporation (NYSE: NWA) have revived merger talks. It is speculated, the Financial Times reported, that weak demand and high fuel costs are urging the airliners back to the table to work out a merger arrangement.

OTHER PAPERS:

• Evergreen Solar Inc (NASDAQ: ESLR) is expected to announce today that it will double the size of its manufacturing facility in Massachusetts and add about 350 new jobs as part of its ongoing expansion, according to the Boston Globe.

WEB SITES:

• Bloomberg reported that The Goldman Sachs Group Inc (NYSE: GS) has been the only major investment bank that has refused to reduce its leverage. In fact, Goldman's adjusted leverage ratio of assets rose to 18.6 at the end of February, from 17.5 at the end of November.