Here are some highlights from this past week's earnings coverage on BloggingStocks:

• Coinstar Inc. (CSTR) shares surged following stronger-than-expected Q1 earnings driven by DVD rentals.
• Humana Inc. (HUM) shares traded lower despite the report of better-than-expected earnings for Q1.
• IMAX Corp. (IMAX) reported strong Q1 results that easily topped consensus estimates, but shares declined.
• Kellogg Co. (K) topped Q1 earnings expectations and announced a share buyback program.
• Office Depot Inc. (ODP) Q1 earnings fell short of consensus estimates and same-store sales declined.

United Airlines parent UAL Corp. (UAUA) was singled out for a directionally neutral spread strategy on Wednesday, with one options trader betting on near-term volatility for the airline issue. Shortly after the opening bell, a block of 325 contracts changed hands on UAUA's June 24 call for the ask price of $1.32, indicating they were purchased. Simultaneously, a matching block of 325 June 16 puts traded at the ask price of $0.50, revealing these contracts were also bought.

US Airways Group (LCC) has been in the spotlight ever since word hit the street that the airline was considering a potential merger with UAL Corp.'s (UAUA) United Airlines. Now the shares are attracting even more attention, thanks to an industry report suggesting that average summer airfares could rise 25% on a year-over-year basis.

As a result, LCC's call options have been drawing a crowd. On Tuesday alone, call volume surged to more than double the norm, with 7,345 contracts crossing the tape. During the course of the session, traders on the International Securities Exchange (ISE) alone bought to open 4,129 calls on the airline, compared to just one put.

Here are some highlights from this past week's earnings coverage on BloggingStocks:

• Apple Inc. (AAPL) posted its highest quarterly revenue ever, easily beating estimates, as iPhone sales doubled.
• Boeing Co. (BA) swung to a larger-than-expected Q4 profit but guidance fell short of analysts' estimates.
• Chevron Corp. (CVX) fell short of analysts' earnings estimates for Q4, sending shares lower.
• Cisco Systems Inc. (CSCO) shares rose after optimistic statements by the CEO ahead of Q2 results.
• Eastman Kodak Co. (EK) shares surged after it beat Q4 expectations by a wide margin and cash flow improved.
• Ford Motor Co. (F) reported its first annual profit in four years due to cost-cutting and improved market share.
• Halliburton Co. (HAL) reported lower Q4 earnings but beat estimates by a penny, and revenue also fell.

US Airways Group (LCC) stepped into the earnings spotlight Thursday morning, with the airline reporting a fourth-quarter loss of $79 million, or 49 cents per share -- representing a major improvement over its year-ago deficit of $543 million, or $4.76 per share. Excluding items such as hedging write-downs, US Airways' loss was only 20 cents per share, down from $1.94 in the fourth quarter of 2008.

Meanwhile, revenue dwindled 4.9% to $2.6 billion. Passenger revenue per available seat mile dropped 7%, while load factor backpedaled from 80% to 79.8%. US Airways was able to boost its bottom line even as top-line results suffered, thanks to a 17% decline in operating expenses (mostly due to more favorable fuel costs).

The fact that there hasn't been any action in a while doesn't mean there isn't room for more. Richard Anderson, CEO of Delta Airlines (DAL), says that the airline industry could consolidate further -- not exactly a shock in an industry that is known for universal financial suffering. He notes, "If a transaction were to occur, economics should prevail."

The only concern, of course, is whether the Obama administration would sign off on any future deals. Anderson believes, "I think the case can be made ultimately, but it remains to be seen what this administration's take will be."

For years, it's been evident that smaller airlines have had an operating advantage, particularly when they use less expensive airports. They've been able to post better numbers as a result, and in the current travel slump, they've outperformed the larger carriers. Well, they've also picked up a considerable amount of market share.

According to a report by USA Today, low cost carriers now have 30% of the market in the United States. Price-sensitive consumers are turning to cheaper alternatives, even if it means (for fliers with elite status) giving up the perks they've earned through years of customer loyalty.

The US Airways (NYSE: LCC) ticker symbol says it all: LCC = Low Cost Carrier. With its latest announcement, the airline may want to change it to LEC -- Low Expense Carrier. In an attempt to keep pace with the plunging travel market, US Airways is cutting 1,000 jobs next year, shoving almost all its flying to its three hubs (Philadelphia, Phoenix and Charlotte) and Washington. Several international routes are being cut.

The airline reports that routes from its hubs have been profitable. Currently, US Airways pushes 93% of its flights through these airports, a rate it seeks to push up to 99% in 2010.

Analyst upgrades:

• FBR Capital upgraded McAfee (NYSE: MFE) to Outperform from Market Perform after channel checks indicated the company's September quarter deal flow has been stronger than expected. FBR raised its target on shares to $50 from $41.
• Thomas Weisel upgraded Adtran (NASDAQ: ADTN) to Overweight from Market Weight, citing increased wireless backhaul capex spending by Tier-1 carriers. The firm raised its target to $32 from $21.
• RBC Capital upgraded Brunswick (NYSE: BC) to Outperform from Sector Perform as the firm thinks the company no longer has liquidity risk and can generate significant profits by 2012. The firm set a $17 target on the stock.
• Bronco Drilling (NASDAQ: BRNC) was upgraded to Hold from Underperform at Jefferies.
• LSI Corp. (NYSE: LSI) was upgraded to Buy from Hold at Deutsche Bank.
• UBS upgraded U.S. Airways (NYSE: LCC) and UAL Corp. (NASDAQ: UAUA) to Buy from Neutral.