Sunny skies are here for Ausra, the solar thermal company backed by Kleiner Perkins and Khosla Ventures. The company is looking for a buyer, and it's already talking to three, according to a report by Reuters. Everything is up for grabs, from a majority stake in the company to 100% of it, and the back-and-forth going on is at a "very aggressive level."

The businesses looking to pick up Ausra are said to be global power generation conglomerates but haven't been named yet. So, the clean energy company would be a way for one of them to diversify.

Analyst upgrades:

• Collins Stewart upgraded General Dynamics (NYSE: GD) to Buy from Hold as it finds the valuation compelling at current levels and sees potential upside from a better economy and better-than-expected defense budgets.
• SunTrust views the sell-off in shares of Cabot Oil (NYSE: COG) as a buying opportunity and expects the Pennsylvania Department of Environmental Protection order to be resolved quickly. The firm upgraded Cabot to Buy from Neutral.
• Barclays upgraded Cisco (NASDAQ: CSCO) to Overweight from Equal Weight based on expectations for improved carrier demand, continued U.S. momentum, and an improved Europe.
• Applied Materials (NASDAQ: AMAT) was upgraded to Buy from Hold at Citigroup.
• Stericycle (NASDAQ: SRCL) was upgraded to Gradually Accumulate from Hold at Soleil.
• Grupo Televisa (NYSE: TV) was upgraded to Neutral from Sell at Goldman.

Analyst upgrades:

• Citigroup upgraded MEMC Electronic (NYSE: WFR) to Buy from Hold after channel checks indicated solar poly price pressures are easing. The firm added MEMC to its Top Picks Live list and raised its price target on shares to $24 from $15.
  
• FBR Capital upgraded PHH Corp (NYSE: PHH) to Outperform from Market Perform to reflect an improvement in mortgage banking fundamentals and recent management changes at the company. The firm raised its target on shares to $23 from $13.
  
• Deutsche Bank upgraded PerkinElmer (NYSE: PKI) to Hold from Sell on valuation, seeing a balanced risk/reward at current levels. The firm raised its target on shares to $19 from $14.
• Pearson plc (NYSE: PSO) was upgraded to Outperform from Neutral at Credit Suisse.
  
• Dell (NASDAQ: DELL) was upgraded to Conviction Buy from Neutral at Goldman.
  
• Nymagic (NYSE: NYM) was upgraded to Market Perform from Underperform at Keefe Bruyette.

Today was an unusually active day for extremely volume increases in several stocks which traded on news and rumors.

Shares in Sequenom (NASDAQ: SQNM) jumped over 10% on takevover rumors.

Rite Aide (NYSE: RAD) moved higher by 5% on larger than normal volume as it beat earnings estimates and Monsanto (NYSE: MON) traded up on strong numbers and took a number of agriculture stocks with it. Oracle (NASDAQ: ORCL) also benefited from earnings above Wall Street forecasts.

Palm (NASDAQ: PALM) traded higher as RBC upped its price target to $18 from $14, and MEMC (NYSE: WFR) fell on a downgrade from JPMorgan.

Douglas A. McIntyre is an editor at VSInvestor.com.

Analyst upgrades:

• Citigroup upgraded Amazon.com (NASDAQ: AMZN) to Buy from Hold on expectations the company's top-line growth rate could be more sustainable than expected and its operating margins could recover given due to less retail discounting. The firm raised its price target on shares to $97 from $65.
  
• UBS upgraded King Pharmaceuticals (NYSE: KG) to Buy from Sell based on expectations that Sandoz will settle patent litigation regarding Skelaxin after last weeks settlement of Clarinex with Schering-Plough (SGP).
  
• Jefferies upgraded Reliance Steel (NYSE: RS) to Buy from Hold as it believes steel prices and demand are close to near-term bottoms. The firm raised its target on the stock to $44 from $25.
• Palm (NASDAQ: PALM) was raised to Buy from Neutral at Banc of America/Merrill.
  
• Nestle (OTC: NSRGY) was lifted to Neutral from Underweight at JP Morgan.
• Johnson & Johnson (NYSE: JNJ) was upgraded at Wachovia to Outperform from Market Perform.

Analyst upgrades:

• Jefferies upgraded Check Point Software (NASDAQ: CHKP) to Buy from Hold as they believe the recently acquired Nokia security appliance business should drive 2009 revenue and EPS meaningfully higher. The firm raised their target price to $27 from $20.
  
• Goldman upgraded Motorola (NYSE: MOT) to Buy from Neutral and added shares to its Conviction Buy List. The firm expects shares to outperform even if phones don't given the overly negative value for the business.
  
• Research in Motion (NASDAQ: RIMM) was upgraded to Outperform from Sector Perform at RBC Capital. The firm cites improving margin visibility and execution, and lowered expectations for the upgrade.
• Ares Capital (NASDAQ: ARCC) was upgraded to Neutral from Underweight at JP Morgan.
  
• Canadian Pacific (NYSE: CP) was raised at Canaccord to Buy from Hold.
  
• Lloyds TSB (NYSE: LYG) was upgraded to Buy from Neutral at UBS.

Analyst downgrades:

• JP Morgan downgraded Venoco (NYSE: VQ) to Underweight from Overweight based on valuation and debt concerns.
  
• UBS downgraded MEMC Electronic (NYSE: WFR) to Neutral from Buy, added shares to the Short-Term Sell List and lowered their target to $14.50 from $20. The firm believes 2009 wafer sales will be much worse than expected.
  
• Deutsche Bank downgraded SINA (NASDAQ: SINA) to Hold from Buy to reflect integration risks from the recent acquisition of Focus Media's digital OOH assets as they see little room for near-term upside.
• Palm (NASDAQ: PALM) was lowered to Neutral from Overweight at JP Morgan.
  
• Polo Ralph Lauren (NYSE: RL) was cut to Sell from Neutral at Goldman.
  
• Telus (NYSE: TU) was downgraded at Banc of America/Merrill to Underperform from Neutral.

Analyst initiations:

• Societe Generale believes HSBC (NYSE: HBC) will need to cut its dividend and raise additional capital in order to strengthen its capital base. Shares were initiated with a Sell rating.
  
• Citigroup initiated United Technologies (NYSE: UTX) with a Hold rating and $55 target. The firm sees downside risk to the company's guidance and believes consensus estimates could be too high.
  
• B. Riley assumed Matrixx Initiatives (NASDAQ: MTXX) with a Buy rating and $22 target. The firm finds shares attractively valued and sees limited downside risk from current levels.
• ASML Holding (NASDAQ: ASML) was initiated at Deutsche Bank with a Hold rating.

This post was written by Minyanville contributor Sean Udall

Maybe the charts will take care of this decision for frustrated investors. Nothing ends selling and starts buying like a spiky MACD right cross.

And maybe the group move (lower) was just one massive liquidation trade and the biggest of the machines knew where the weakest hands were the most susceptible to letting shares go to meet redemptions.

I suspected this was the case in solar with companies like First Solar (NASDAQ: FSLR), SunPower (NASDAQ: SPWRA), LDK SolarLDK), MEMC Electronics (NYSE: WFR) and Suntech Power (NYSE: STP). The companies have no funding issues, big industrial projects, and are sold through for years.

I'm actually inclined to buy the strength as we have oil down, and a new month of us. We are also in an environment where little hard analysis from the analyst community has been fostered. Simply put, speculation of a macro condition (credit crunch), has been liberally applied to micro condition sets for an industry in an early growth phase. So basically a coin has been tossed in the air and the analyst community has mostly called a negative outcome. A few bullish holdouts exist but by and large this looks like a group think nightmare in every direction so far.

I still like most of the big guns and a couple smaller shops but I've always been cautious of names in need of funding and that is more critical now. Also, an Obama victory trade on the group might fade very hard just as the bailout passage was.

Analyst upgrades:

• Wachovia upgraded shares of Exelon (NYSE: EXC) to Outperform from Market Perform to reflect the company's attractive nuclear fleets and strong operational track record.
  
• Jesup & Lamont upgraded Ormat Technologies Inc. (NYSE: ORA) to Buy from Hold on valuation and increasing visibility on near-term Products revenue.
  
• RBC Capital upgraded Memc Electronic (NYSE: WFR) to Outperform from Sector Perform on expectations of improved demand growth following the likely eight-year extension of the US solar tax credit program.
• AmBev (NYSE: ABV) was raised to Outperform from Neutral at Credit Suisse.
  
• AmerisourceBergen (NYSE: ABC) was upgraded at Merrill Lynch to Buy from Neutral.
  
• Piper upgraded Anadys Pharma (NASDAQ: ANDS) to Neutral from Sell.

Analyst downgrades:

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

• Boeing Co. (NYSE: BA) earnings prospects may have encouraged the machinist union to strike.
• Ciena Corp. (NASDAQ: CIEN) Q3 results and weak guidance led shares to a new 52-week low.
• Corning Inc. (NYSE: GLW) lowered its Q3 earnings guidance below previous and analysts' forecasts.
• Dollar Financial Corp. (NASDAQ: DLLR) beat Q4 estimates and posted record 2008 results.
• Ericsson Telephone Co. (NASDAQ: ERIC) was downgraded because it could miss Q3 earnings expectations.
• Esterline Technologies (NYSE: ESL) topped Q3 expectations due to robust aerospace and defense markets.
• Joy Global Inc. (NASDAQ: JOYG) posted strong Q3 results due to a sharp increase in orders.
• Kraft Foods Inc. (NYSE: KFT) backed away somewhat from its previous 2008 earnings guidance.
• Legg Mason Inc. (NYSE: LM) earnings prospects for the next several quarters led to an analyst downgrade.
• MEMC Electronic Materials Inc. (NYSE: WFR) mid quarter update warned of declining demand for chips.
• Navistar International Corp. (NYSE: NAV) was upgraded following a strong Q3 report.
• New York Times Co. (NYSE: NYT) ongoing losses haven't diminished Rupert Murdoch's interest in it.
• Nokia Corp. (NYSE: NOK) warned that it would miss earnings estimates due in part to weak sales.
• Shanda Interactive Entertainment Ltd. (NASDAQ: SNDA) better-than-expected Q2 led to an analyst upgrade.
• Staples Inc. (NASDAQ: SPLS) Q2 earnings slipped while revenues rose, beating expectations.
• Take-Two Interactive Software Inc. (NASDAQ: TTWO) Q3 results soared but cut its Q4 guidance.
• Tenet Healthcare Corp. (NYSE: THC) was upgraded on its prospects for beating expectations.
• Terex Corp. (NYSE: TEX) warned that earnings for Q3 and Q4 would be lower than estimates.
• Tiffany & Co. (NYSE: TIF) posted better-than-expected Q2 results and offered full-year guidance.
• Toll Brothers Inc. (NYSE: TOL) reported its fourth straight quarterly loss, but it was smaller than expected.

Also, Jim Cramer discusses a decline in earnings resulting from a collapse of oil and oil services.

Upcoming quarterly reports include Korn/Ferry (NYSE: KFY), Pep Boys (NYSE: PBY), Campbell Soup (NYSE: CPB), Krispy Kreme (NYSE: KKD), and Lululemon Athletica (NASDAQ: LULU).

Visit AOL Money & Finance for more earnings coverage.

After the closing bell last night, silicon-wafer producer MEMC Electronic Materials (NYSE: WFR) offered a mid-quarter update that's sent the shares reeling into negative territory this morning. The report started auspiciously enough, as CEO Nabeel Gareeb noted that current production rates "could allow us to achieve results in the upper half of our targeted financial range" of $560 million to $620 million in revenue.

His comment seemed to indicate that MEMC might exceed analysts' expected revenue of $596.7 million, as reported by Thomson Financial. But Gareeb then tempered his optimism by adding, "However, there is increased softness in demand from semiconductor applications customers, primarily due to their inventory reduction initiatives. These elements warrant a continued degree of caution in our outlook, given the amount of time left in the quarter."

Additionally, MEMC warned that it expects operating expenses of approximately $43 million for the third quarter, up from its previous projection of $41 million. The increase is largely attributable to one-time, non-cash severance-related expenses.

Analyst Shaw Wu of American Technology Research said his firm's checks with suppliers indicate some weakness in HP's (NYSE: HPQ) inkjet sales and consumer PCs in the U.S, according to the AP.

UBS downgraded Darden Restaurants (NYSE: DRI) to Neutral from Buy, according to Briefing.com. The news service also writes that Calyon initiated MEMC Electonic (NYSE: WFR) as a "Buy".

Goldman Sachs upgraded Mastercard (NYSE: MA) from "Hold" to "Buy", according to StreetInsider.com.

Douglas A. McIntyre is an editor at 247wallst.com.

MOST NOTEWORTHY: Memc Electronic, Citigroup and Sanmina were today's noteworthy upgrades:

• Citigroup upgraded shares of Memc Electronic (NYSE:WFR) to Buy from Hold on valuation as they believe the bad news is priced in following the company's quarter. The firm raised Memc's target to $65 from $64. JP Morgan upgraded shares to Overweight from Neutral on valuation.
  
• Morgan Stanley upgraded Citigroup (NYSE:C) to Equal Weight from Underweight based on asset sales, improved top-line, and dividend.
  
• Credit Suisse upgraded Sanmina (NASDAQ:SANM) to Outperform from Neutral citing valuation and margin traction. The firm raised Sanmina's target to $2.50 from $1.60. Cowen upgraded Sanmina to Outperform from Neutral following the Q3 report and guidance.

OTHER UPGRADES:

• Pharm Product (NASDAQ:PPDI) was upgraded at Baird to Outperform from Neutral.
  
• Sunoco Logistics (NYSE:SXL) was raised to Outperform from Market Perform at Wachovia.
  
• JP Morgan lifted Air Products (NYSE:APD) to Overweight from Neutral.

With the high fuel prices over the past year, solar stocks have been making some nice gains. But there are some signs that they may not be as safe as they appear. Investors' interest in solar companies increased due to soaring crude futures, but there are some factors to take into account before investing money into solar.

The current BusinessWeek looks at stocks such as First Solar (NASDAQ: FSLR), SolarWorld and Evergreen Solar (NASDAQ: ESLR), which have been facing increased volatility based on contract deal news or the lack thereof.

A major impact came in May, with speculation that Germany would lower subsidies given to companies and individuals who install alternative energy equipment. But the cut was not as deep as expected and stocks rebounded nicely.

MOST NOTEWORTHY: CBS Corp., Thornburg Mortgage and DiamondRock Hospitality were among today's noteworthy downgrades:

• CBS Corp. (NYSE: CBS) was downgraded to Market Perform from Outperform at Wachovia, citing the weak ad environment and potential M&A strategy to acquire growth, which will limit upside near-term.
  
• Thornburg Mortgage (NYSE: TMA) was downgraded to Underperform from Outperform at Friedman Billings, which said the recent capital raise and related transactions result in 95% dilution, and questions how shares will trade when 2.9B restricted common shares are registered and start trading in mid- May.
  
• DiamondRock Hospitality (NYSE: DRH) was downgraded to Neutral from Outperform at Baird following the company's reduced guidance.

OTHER DOWNGRADES:

• Savvis Inc. (NASDAQ: SVVS) was downgraded to Equal Weight from Overweight at Lehman following the company's Q1 report and guidance.
  
• Memc Electronic Materials (NYSE: WFR) was downgraded to Neutral from Overweight at J.P. Morgan, who cited high Street expectations and a very tight capacity expansion schedule over the next few quarters.

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

• Amazon.com Inc. (NASDAQ: AMZN) profits rose 30%, easily beating analysts' expectations.
• AMETEK Inc. (NYSE: AME) beat Q1 estimates on global strength and recent acquisitions.
• Apple Inc. (NASDAQ: AAPL) easily beat Q2 expectations but offered a weak outlook.
• AT&T Inc. (NYSE: T) posted strong Q1 results thanks to the popularity of the iPhone.
• Baidu.com Inc. (NASDAQ: BIDU) beat earnings and saw an upgrade from Citigroup Inc. (NYSE: C).
• Broadcom Corp. (NASDAQ: BRCM) Q1 profit soared, and it raised its guidance.
• Cymer Inc. (NASDAQ: CYMI) beat Q1 estimates and announced a share million buyback program.
• Electronic Data Systems Inc. (NYSE: EDS) posted Q1 profits on cost cutting and new contracts.
• EMC Corp. (NYSE: EMC) Q1 earnings fell on on acquisition-related charges.
• Hexcel Corp. (NYSE: HXL) beat Q1 estimates on increased commercial aerospace sales.
• Huaneng Power ADS (NYSE: HNP) earnings plunged on coal prices, but the stock went higher.
• Level 3 Communications Inc. (NASDAQ: LVLT) narrowed its loss on higher sales of networking services.
• McAfee Inc. (NYSE: MFE) Q1 profit plunged on product development and marketing costs.
• MEMC Electronic Materials Inc. (NYSE: WFR) missed analysts' estimates for the first quarter.
• Microsoft Corp. (NASDAQ: MSFT) beat earnings expectations and raised its full-year guidance.
• Netflix Inc. (NASDAQ: NFLX) profit soared in the first quarter on increase in subscriptions.
• Nintendo Co. (OTC: NTDOY) posted record results due to the popularity of the Wii system.