Analyst upgrades:

• Jefferies upgraded Biogen (NASDAQ: BIIB) to Buy from Hold based on valuation. The firm, which has a $50 target on the stock, believes Tysabri PML cases are reflected in shares.
• Deutsche Bank upgraded Nordstrom (NYSE: JWN) to Buy from Hold as it finds the valuation attractive and believes the company's sales are benefiting from stabilization in California and share gains. Deutsche raised its target on shares to $45 from $36.
• RBC Capital upgraded Yum! Brands (NYSE: YUM) to Outperform from Sector Perform and raised its target to $39 from $36 citing valuation and views it as a low risk option on a global economic recovery.
• Credit Suisse (NYSE: CS) was upgraded to Buy from Hold at Citigroup.
• Royal Caribbean (NYSE: RCL) was upgraded to Outperform from Market Perform at Wells Fargo.
• Alcatel-Lucent (NYSE: ALU) was upgraded to Hold from Sell at RBS.

"The worst crisis of all time, in my view, is the critical global shortage of fresh water," says " Larry Edelson. In Money & Markets, the resource expert offers four water sector plays.

"The world's water crisis is now getting worse by the day. And the global financial and credit crisis is merely one reason why. Another is the ongoing modernization of major parts of the world, which is increasing demand for water, while at the same time polluting it.

"Yet another is major droughts around the world, including in our own back yard, where 60% of the U.S. is officially experiencing a drought.

"New technologies and techniques for better water supply management and improved conservation on the demand side could potentially avert a worldwide disaster. And as a long-term investment, water is one of my favorites. For both its tremendous social cause as well as its profit potential.

"We see flowing profits from companies in the water sector involved with pipes, pumps, regulators and other equipment," notes Neil George.

In his industry-leading Personal Finance newsletter, the advisor offers a fascinating overview of three companies that help "utilities and other industries provide quality water service."

"Aging pipes are one of the most pressing challenges in the US and beyond. Studies show that in some municipalities, loss from leaky pipes accounts for as much as 10% of water consumption.

"Ameron International (NYSE: AMN) is a pipe manufacturer with operations on every continent. Earnings per share don't show smooth-line growth on a quarterly basis given the cyclical nature of construction. But it does show solid, year-over-year growth.

"There's some price volatility as investors are jarred with increasingly pessimistic domestic construction outlooks, but overseas earnings will continue to bolster the balance sheet.

"Watts Water Technologies (NYSE: WTS) manufactures pumps, valves and controls for a broad array of both consumer and industrial applications.

MOST NOTEWORTHY: Websense Inc (WBSN), Dow Jones & Co, Inc (DJ), Krispy Kreme Doughnuts (KKD), US Airways Group, Inc (LLC), Starwood Hotels & Resorts Worldwide, Inc (HOT) were today's more noteworthy downgrades:

• Jefferies downgraded Websense Inc (NASDAQ: WBSN) to Underperform from Hold with a $20 target to reflect slowing growth in the URL market, near-term business disruption from the pending SRF deal and summer software seasonality.

• Dow Jones & Co (NYSE: DJ) was cut to Hold from Buy at Gabelli and to Market Perform from Outperform at Wachovia.

• Krispy Kreme (NYSE: KKD) was downgraded to Neutral from Overweight at Prudential.

• Merrill Lynch downgraded US Airways Group (NYSE: LCC) to Neutral from Buy.

• Goldman downgraded Starwood Hotels (NYSE: HOT) to Neutral from Buy to reflect the weaker-than-expected quarterly fundamentals reported by the major hotel companies. The firm believes investors should stay away from the lodging sector...

OTHER DOWNGRADES:

• JP Morgan cut Federated Investors, Inc (NYSE: FII) to Underweight from Neutral on valuation.

• Genesco Inc (NYSE: GCO) was downgraded to Market Perform from Outperform at Piper Jaffray.

• UBS cut Liz Claiborne (NYSE: LIZ) to Neutral from Buy.

• Tibco Software Inc (NASDAQ: TIBX) was cut to Hold from Buy at Jefferies.

• Baird downgraded Watts Water Technologies, Inc (NYSE: WTS) to Underperform from Neutral.

Analyst summaries provided by TheFlyOnTheWall.com (subscription required).

MOST NOTEWORTHY: MasterCard Inc (MA), Domino's Pizza, Inc (DPZ), STEC, Inc (STEC) were some of today's more notable initiations:

• Suntrust initiated MasterCard Inc (NYSE: MA) with a Buy rating and $130 target, believing the company is the best positioned to benefit from the secular shift from cash to e-payments at the point of sales.

• Domino's Pizza Inc (NYSE: DPZ) was initiated with an Outperform rating and $38 target at Friedman Billings.

• AG Edwards initiated STEC Inc (NASDAQ: STEC) with a Buy rating and $12 target. The firm feels shares are undervalued and that the company's growth profile and profitability should dramatically improve post-consumer business sale and revenue recognition change.

OTHER INITIATIONS:

• California Pizza Kitchen (NASDAQ: CPKI) was initiated with a Market Perform rating and $35 target at Friedman Billings.

• Stanford believes Watts Water Technologies, Inc (NYSE: WTS) is one of the more compelling names in the water infrastructure space and initiated shares with a Buy rating and $42 target.

• Morgan Keegan believes Horizon Lines Inc's (NYSE: HRZ) earnings potential has yet to be realized and initiated shares with an Outperform rating.

• Lazard initiated several solar power companies with Buy ratings: SunPower Corp (NASDAQ: SPWR), First Solar, Inc (NASDAQ: FSLR), Evergreen Solar, Inc (NASDAQ: ESLR) and Energy Conversion Devices, Inc (NASDAQ: ENER).

Analyst summaries provided by TheFlyOnTheWall.com (subscription required).