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.

Analyst upgrades:

• Morgan Stanley upgraded shares of Apple (NASDAQ: AAPL) to Overweight from Equal Weight on expectations of continued iPhone growth. The firm raised its target on the stock to $180 from $105.
• FBR Capital upgraded Bank of America (NYSE: BAC) to Market Perform from Underperform as it sees limited downside with half of the company's capital plan completed. The firm keeps a $12 target on the stock.
• Jefferies upgraded Cash America (NYSE: CSH) to Buy from Hold to reflect a strengthened balance sheet following the capital raise and easing regulatory risk. The firm raised its target price to $30 from $22.
• Ericsson (NASDAQ: ERIC) was upgraded to Outperform from Market Perform at Bernstein.
• MB Financial (NASDAQ: MBFI) was raised to Outperform from Neutral at Baird.
• Pinnacle West (NYSE: PNW) was upgraded at Credit Suisse to Outperform from Neutral.

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

• Acuity Brands Inc. (NYSE: AYI) beat second-quarter estimates on increased productivity and new products.
• Advanced Micro Devices (NYSE: AMD) cut its outlook and announced job cuts.
• Alcoa Inc. (NYSE: AA) missed first-quarter earnings estimates but beat revenue expectations.
• Circuit City Stores Inc. (NYSE: CC) surprised Wall Street by posting a second-quarter profit.
• Dell Inc.'s (NASDAQ: DELL) rosy 2008 forecast is based on cost cuts, overseas growth, share buybacks.
• DuPont & Co. (NYSE: DD) raised its first-quarter outlook on strength in agriculture and emerging markets.
• Eastman Chemical Co. (NYSE: EMN) raised its first-quarter guidance on strong sales and higher prices.
• EXFO Electro-Optical Engineering (NASDAQ: EXFO) beat estimates and announced an acquisition.
• Foundry Networks Inc. (NASDAQ: FDRY) slashed its first-quarter outlook, blaming the weak economy.
• Genentech Inc. (NYSE: DNA) beat first-quarter earnings estimates, but not revenue expectations.
• General Electric Co. (NYSE: GE) missed earnings expectations and lowered its guidance.
• Novellus Systems Inc. (NASDAQ: NVLS) trimmed its first-quarter earnings and revenue forecasts.
• Progressive Corp. (NYSE: PGR) beat estimates though first-quarter profits fell due to lower premiums.
• Rite Aid Corp. (NYSE: RAD) swung to a loss in the fourth quarter on acquisition costs and a tax charge.

EXFO Electro-Optical Engineering (NASDAQ: EXFO) specializes in the design and manufacture of equipment used by telecommunications carriers, cable television companies and public utilities operators to test and monitor their networks. It also provides light-based systems used in medical device and opto-electronics assemblies, as well as fluorescence microscopy and electrophysiology instruments used in the life sciences sector. Customers include AT&T (NYSE: T) and Nortel Networks (NYSE: NT). Agilent Technologies (NYSE: A) is a major competitor.

The company pleased investors last week, when it reported fiscal Q2 EPS of six cents and revenues of $43.3 million. Analysts had been expecting two cents and $42.3 million. Management also guided Q3 EPS to between four and seven cents (five cent consensus) and Q3 revenues to between $45 million and $48 million ($46.93 million consensus). Further, the firm announced a deal to acquire Internet Protocol applications tester Brix Networks for $28.5 million in cash. RBC Capital Markets and Roth Capital subsequently reiterated "buy" ratings on the stock and declared price targets in the $7-$8 range