Analyst Upgrades

• SINA (SINA) to overweight from neutral at Piper Jaffray.
• Texas Instruments (TXN), ON Semiconductor (ONNN), Xilinx (XLNX) and Valassis (VCI) to overweight from neutral at JPMorgan.
• Salesforce.com (CRM) to buy from hold at Canaccord.
• Peet's Coffee (PEET) to buy from neutral at Janney Capital.
• Invesco Mortgage (IVR) to overweight from equal weight at Barclays.
• BTU International (BTUI) to buy from hold at Wunderlich.
• Coca-Cola Femsa (KOF) to overweight from neutral at HSBC.
• Chipotle (CMG) to market perform from underperform at Morgan Keegan.

Analyst Upgrades

• Xilinx (XLNX) to buy from hold at Auriga.
• Orion Energy (OESX) to buy from neutral at Roth Capital.
• Goodyear Tire (GT) to buy from fair value at CRT Capital.
• RadioShack (RSH) to neutral from underperform at Wedbush.
• Novo Nordisk (NVO) to buy from neutral at Goldman.

Tuesday, chipmaker Xilinx (XLNX) announced that it was cutting its current-quarter (third quarter) revenue forecast thanks to weaker-than-expected sales to some of its larger communications customers. This announcement comes during a series of quarters in which the company has seen record sales, thanks to rising demand stemming from a perceived economic rebound.

One analyst calls this news, "evidence of a cyclical inventory correction that we'd been expecting and have talked about previously." Nevertheless, the same analyst said that it could take longer than Xilinx had previously estimated for inventory to come back to better levels.

Analyst Upgrades

• Red Hat (RHT) and American Public (APEI) to outperform from sector perform at RBC Capital.
• KBR (KBR) and Foster Wheeler (FWLT) to buy from neutral at Goldman.
• Bio-Rad (BIO) to outperform from market perform at Leerink.
• Oceaneering (OII) to outperform from neutral at Credit Suisse.
• ASM International (ASMI) and Avid Technology (AVID) to overweight from neutral at JPMorgan.
• Dominion Resources (D) to equal weight from underweight at Morgan Stanley.
• Nationwide Health Properties (NHP) to buy from hold at Jefferies.
• Vivus (VVUS) to buy from underperform at BofA/Merrill.
• Intersil (ISIL) to buy from hold at Canaccord.

Analyst Upgrades

• Goldman upgraded Citigroup (C) to conviction buy from buy, Principal Financial (PFG) to buy from neutral, and Stancorp Financial (SFG) and Hartford Financial (HIG) to neutral from sell.
• JetBlue (JBLU) was upgraded to overweight from neutral at JPMorgan.
• Barclays upgraded Royal Caribbean (RCL) and Carnival (CCL) upgraded to overweight from equal weight.
• Hollysys Automation (HOLI) was upgraded to buy from hold at Roth Capital.
• RBC Capital upgraded Alliance Data Systems (ADS) to outperform from sector perform.
• RRI Energy (RRI) was upgraded to buy from hold at Citigroup.

The transmission of data wirelessly is the new big movement in tech. Kindles, 4G phones, tablets and more will soon be flooding marketplaces worldwide. The wireless and new telecom revolution will be sweeping the market place for years to come. This leads the investor to the obvious question: "How do I make a buck off all this?"

Here, for your consideration, are some stocks likely to thrive in the wireless tech revolution. As new devices and functionalities come onto the market, each of these stocks could perform strongly. Share prices are as of Wednesday's close.

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

• Advance Auto Parts Inc. (AAP) was downgraded due to concerns about its 2010 earnings outlook.
• Analogic Corp. (ALOG) received an analyst's downgrade after it reported weaker-than-expected earnings.
• AutoZone Inc. (AZO) strong Q1 results beat earnings expectations, but shares rose only a little.
• BWAY Holding Co. (BWY) received an analyst's upgrade following release of its Q4 results.
• Casey's General Stores Inc. (CASY) topped Q2 earnings estimates but lower revenue fell short.
• Ciena Corp. (CIEN) shares plummeted after it fell short of its earnings expectations for Q4.

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

• Abbott Laboratories (NYSE: ABT) higher Q3 earnings topped expectations but revenue was in line.
• Advanced Micro Devices Inc. (NYSE: AMD) posted better-than-expected Q3 results, but shares sold off.
• Allegheny Technologies Inc. (NYSE: ATI) was downgraded on concerns about its Q4 guidance.
• Bank of America Corp. (NYSE: BAC) shares fell after it posted a deeper-than-expected quarterly loss.
• Citigroup Inc. (NYSE: C) fell victim to profit taking despite reporting better-than-expected earnings.
• CSX Corp. (NYSE: CSX) better-than-expected Q3 earnings sent shares higher, despite a decline in revenue.

The chip sector is pretty hot. Intel (NASDAQ: INTC) reported a respectable quarter this week, and the stock is near a 52-week high. Also close to their highs of the year are Texas Instruments (NYSE: TXN) and Advanced Micro Devices (NYSE: AMD).

Well, you can add Xilinx (NASDAQ: XLNX) to the list. The company, an expert on programmable logic, reported an earnings-beating quarter yesterday after the bell, according to Reuters. Xilinx made 23 cents per share in Q2, a penny ahead of analyst expectations. Revenue likewise was slightly ahead of the projections.

Xilinx, Inc. (NASDAQ: XLNX) reported earnings for the first quarter on Wednesday after the bell. The technology company devoted to programmable logic said sales fell by 5% on a sequential basis and by 23% on a year-over-year basis. Not a great start to an earnings report, huh? It gets worse. On an adjusted basis, Xilinx made 21 cents per share versus 31 cents per share in the first quarter of fiscal '09. According to TheStreet.com, that 21 cents was good for a beat by two pennies.

Today, however, the market doesn't seem to be feeling the performance. As of this writing, afternoon trading saw shares of Xilinx bid down by over 3.5% on very heavy volume.

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

• American International Group Inc. (NYS: AIG) posted a record loss even as it asks for more taxpayer funds.
• AnnTaylor Stores Corp. (NYSE: ANN) shares sank after it missed Q4 expectations by a wide margin.
• AutoZone Inc. (NYSE: AZO) reported strong Q2 results, sending shares upward toward its 52-week high.
• Big Lots Inc. (NYSE: BIG) shares soared after it reported better-than-expected numbers for Q4.
• Chico's FAS Inc. (NYSE: CHS) Q4 loss widened on impairment charges and severance costs.

Xilinx (NASDAQ: XLNX), a tech entity involved in programmable logic and a colleague of companies like Actel (NASDAQ: ACTL) and Altera (NASDAQ: ALTR), issued a business update on Tuesday. Believe it or not, it contained some good news. How about that for a change? I'm sure shareholders were pleased.

According to this news item, Xilinx believes that its revenue picture should be better than previously thought. Sales should drop by somewhere between 13% and 18% for the March quarter on a sequential basis. Management had originally believed that they'd have to report a sequential revenue drop between 15% and 25%. So, yes, there will still be a decline, but hey, if it's less than expected, you gotta take that. It's too bad, though, that the gross margin range wasn't raised. It should still fall between 61% and 63%. If management had raised that as well, then I bet the stock would have closed even higher on the news. It rose almost 4% on better-than-average volume yesterday.

The new earnings season ramps up this week as Alcoa Inc. (NYSE: AA) reports fourth-quarter results. Last week, the Pittsburgh-based producer of aluminum and alumina announced layoffs and production cuts as a reaction to the economic downturn. Analysts surveyed by Thomson Reuters expect that Alcoa will have swung to its first quarterly loss in years: $0.10 per share. That compares to a profit of $0.36 per share in the same period of the previous year. Revenues for the quarter are expected to have fallen 28.8% from a year ago to $5.3 billion. For 2008, analysts are looking for earnings of $1.40 per share on revenue of $27.6 billion, down from $2.60 per share and $30.8 billion in the previous year. Alcoa missed earnings estimates in three of the past five quarters, by 25.4% in the third quarter. The consensus recommendation of analysts shifted from buy to hold AA during the past quarter. The share price has been climbing in recent weeks, but it is 65.6% lower than a year ago.

Intel Corp. (NASDAQ: INTC) is also scheduled to report fourth-quarter results this week, one of a handful of tech stocks to do so. The number one semiconductor maker is expected to post earnings down 86.8% to $0.05 per share, and sales of $8.2 billion, down 23.3% from a year ago. Last week, Intel forecast sales for the quarter of $8.2 billion. The full-year numbers are expected to be marginally lower than a year ago, or $0.94 per share on $37.7 billion. Intel only missed earnings estimates in one of the past five quarters. Shares are about $2.00 higher than the 52-week low, but 37.2% lower than a year ago.

The earnings crunch begins in earnest this coming week, with companies from Johnson & Johnson (NYSE: JNJ) and PepsiCo Inc. (NYSE: PEP) to Southwest Airlines Co. (NYSE: LUV) and Harley-Davidson Inc. (NYSE: HOG) scheduled to report results for the quarter just ended. But with the ongoing turmoil in the markets, much attention is on the tech and financial sectors. This week will provide plenty to mull over on both counts.

Wall Street expectations for tech stocks are fairly optimistic. Analysts surveyed by Thomson Financial are looking for chip maker Altera Corp. (NASDAQ: ALTR) and software/service company iGate Corp. (NASDAQ: IGTE) to be the sector's biggest earnings gainers of the week. Altera is expected to report earnings of 30 cents per share (up 33.3% from a year ago) on revenue of $355.1 million. Altera had previously forecast flat sales for the quarter, and shares fell to a 52-week low last week. iGate is expected to report earnings of 14 cents per share (up 42.9%) on revenue of $55.6 million. India-based iGate recently spun off its Mastech consulting services. Shares are down 45.0% in the past three months, and also reached a new 52-week low last week.

San Jose-based Novellus Systems Inc. (NASDAQ: NVLS), on the other hand, is expected to report that net income tumbled 90.4% from a year ago to 4 cents per share, on revenue of $245.6 million. Novellus fell to a 52-week low early last week, and shares are down 44.5% year to date.

The earnings crunch is in full swing, and here are a few of the highlights of this past week's earnings coverage from BloggingStocks:

• Abbott Laboratories (NYSE: ABT) swung to a profit on the strength of drug sales.
• AK Steel Holding Corp. (NYSE: AKS) swung to a fourth-quarter profit and easily beat estimates.
• Aladdin Knowledge Systems Ltd. (NASDAQ: ALDN) posted solid results and raised its forecast.
• Amdocs Ltd. (NYSE: DOX) reported a record quarter and reaffirmed its guidance.
• Amgen Inc. (NASDAQ: AMGN) beat exectations, but concerns remain about FDA scrutiny.
• Apple Inc. (NASDAQ: AAPL) easily beat expectations and offered revised guidance (see live blog, transcript).
• Caterpillar Inc. (NYSE: CAT) posted a solid quarter on strong international growth.
• Coach Inc. (NYSE: COH) beat estimates on strong direct-to-customer and same-store sales.
• ConocoPhillips (NYSE: COP) posted a strong fourth quarter due to rising oil prices.
• CSX Corp. (NYSE: CSX) beat expectations as increased productivity offset increased fuel costs.
• Eaton Corp. (NYSE: ETN) posted solid fourth quarter results due to growth overseas.
• Equity LifeStyle Properties Inc. (NYSE: ELS) beat expectations in the fourth quarter and offered guidance.
• Franklin Resources Inc. (NYSE: BEN) reported solid results and increased its quarterly dividend.
• Johnson & Johnson (NYSE: JNJ) posted a solid fourth quarter and affirmed its 2008 guidance.
• Microsoft Corp. (NASDAQ: MSFT) posted strong results due in part to demand for Vista.
• Nintendo Co. (OTC: NTDOY) profit soared on demand for the Wii, and the company raised is sales outlook.
• Nokia Corp. (NYSE: NOK) reported a strong fourth quarter and increased market share in handset sales.