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

• Apollo Group Inc. (NYSE: APOL) posted its third straight quarter of growth as enrollment soared.
• Caterpillar Inc. (NYSE: CAT) earnings prospects will pick up after the first quarter, predicts Jim Cramer.
• Coach Inc. (NYSE: COH) lowered its guidance due to slower traffic and sales during the holiday season.
• EMC Corp. (NYSE: EMC) reaffirmed its revenue and earnings guidance and announced job cuts.
• Google Inc. (NASDAQ: GOOG) was upgraded as Wall Street's Q4 and full-year estimates came down.
• KB Home (NYSE: KBH) failed to narrow its loss as much as expected but beat revenue estimates.
• Logitech International (NASDAQ: LOGI) withdrew its guidance and said it was cutting its global workforce.
• Mosaic Co. (NYSE: MOS) posted strong Q2 results that easily beat earnings expectations (is it a buy?).
• Navistar International Corp. (NYSE: NAV) 2009 outlook fell short of estimates but it predicted 2010 growth.
• Premier Exhibitions Inc. (NASDAQ: PRXI) worse-than-expected Q3 numbers resulted in an downgrade.
• Satyam Computer Sciences Ltd. (NYSE: SAY) admited that it had been inflating earnings for years.
• Super Micro Computer Inc. (NASDAQ: SMCI) was downgraded after preliminary results missed estimates.
• Time Warner Inc. (NYSE: TWX) now expects a loss in 2008 rather than the profit in its previous guidance.
• WD-40 Co. (NASDAQ: WDFC) topped Q1 expectations but also lowered its guidance, sending shares lower.

For more earnings highlights, see Intel, Walmart, Chevron, Family Dollar, Monsanto and others

Upcoming earnings releases include Alcoa Inc. (NYSE: AA), Infosys (NASDAQ: INFY), Linear Technologies (NASDAQ: LLTC) , Xilinx (NASDAQ: XLNX), Genentech (NYSE: DNA), Intel (NASDAQ: INTC), Marshall & Ilsley (NYSE: MI), Sealy (NYSE: ZZ), Johnson Controls (NYSE: JCI).

Visit AOL Money & Finance for more earnings coverage.

Analyst upgrades:

• KeyBanc upgraded Epicor (NASDAQ: EPIC) to Buy from Hold based on several near-term catalysts that include possible convertible debt repurchases, reasonable Q4 results, a proxy fight, and a boost from the Epicor 9 product cycle in 2H09.
  
• KeyBanc also upgraded AK Steel (NYSE: AKS) to Buy from Hold based on relative valuation and said the company could benefit from lower iron ore, scrap natural gas, and labor inputs.
  
• JP Morgan upgraded Lennar (NYSE: LEN) to Overweight from Neutral based on relative valuation.
• Marriott (NYSE: MAR) was upgraded to Buy from Neutral at Goldman.
  
• Raymond James (NYSE: RJF) was raised to Market Perform from Underperform at Wachovia.
  
• Deere (NYSE: DE) was upgraded to Outperform from Market Perform at Bernstein.

Analyst downgrades:

Alcoa Inc. (NYSE: AA) kicks off the new earnings seasons when it reports third quarter results on Tuesday. The Pittsburgh-based aluminum producer, which celebrated its 120th anniversary with the launch of its website, is expected to post a profit of 54 cents per share, down 15.6% from the same quarter of last year, on revenue of $7.2 billion, down 2.1%. While Alcoa has tended to fall short of estimates in recent quarters, in the second quarter it did offer a positive surprise of almost 3%. Its long-term earnings per share growth forecast is 14.8%, a little less than the S&P 500, and analysts polled by Thomson Financial on average recommend buying Alcoa, and have for more than 90 days. Shares reached a new 52-week low last week, and are down 48.9% from a year ago.

General Electric Co. (NYSE: GE) is also expected to report a slip in earnings this week. Analysts anticipate that the conglomerate will post a third-quarter profit of 45 cents per share, down just 6.3% from a year ago, on revenue of $47.7 billion, which is up 12.1%. GE has tended to eke out small positive surprises in recent quarters, by less than 1% in the second quarter. GE's long-term earnings per share growth forecast is only 11.0%, which is less than the sector average and the S&P 500. The consensus recommendation has recently swung to hold GE, but Warren Buffett has bought in to the tune of $3 billion. GE also reached a new 52-week low last week as the markets tumbled. GE shares are down 48.1% from a year ago.

MOST NOTEWORTHY: Suntech Power, Premier Exhibitions and the Homebuilders Sector were today's noteworthy initiations:

• Citigroup named Suntech Power Holding (NYSE: STP) their top pick for China solar due to its leading scale and technology roadmap for higher cell efficiency, initiating shares with a Buy rating and $55 target.
  
• Merriman believes Premier Exhibitions (NASDAQ: PRXI) can move to the $14.50-$17.00 through the continued monetization of the company's current tours, the launching of additional tours and the value of the Titanic artifacts on hand. The firm started shares with a Buy rating.
  
• Lehman initiated D.R. Horton (NYSE: DHI), Ryland Group (NYSE: RYL), Toll Brothers (NYSE: TOL) with Overweight ratings and an $18 target, $31 target and $27 target; KB Home (NYSE: KBH) with an Equal Weight rating and $24 target; and Hovnanian Enterprises (NYSE: HOV) with an Underweight rating and $8 target.

OTHER INITIATIONS:

• Citigroup initiated Yingli Green Energy (NYSE: YGE) with a Hold rating and $24 target.
  
• UBS initiated Citrix Systems (NASDAQ: CTXS) with a Neutral rating and $38 target.
  
• JP Morgan initiated Biodel (NASDAQ: BIOD) with an Overweight rating.