MOST NOTEWORTHY: Nokia Corp (NOK), Sirius Satellite Radio (SIRI) and XM Satellite Radio Holdings (XMSR) topped today's list of upgrades.

• Goldman Sachs upgraded shares of Nokia Corp ADS (NYSE: NOK) to Buy from Neutral and added the company to their Conviction Buy List. Goldman believes Nokia's profit cycle has bottomed and shares could rebound from current levels. In addition, the broker expects Nokia to report solid fourth-quarter earnings.

• JP Morgan upgraded Sirius Satellite Radio (NASDAQ: SIRI) and XM Satellite Radio Holdings 'A' (NASDAQ: XMSR) to Overweight from Neutral as they believe retail and competition fears are largely understood and that both companies will grow subscribers due to deals with automakers.

OTHER UPGRADES:

• Wachovia upgraded YRC Worldwide (NASDAQ: YRCW) to Outperform to Market Perform citing the trucker's recent realignment actions in its regional and long-haul LTL's, the timing cycle to buy trucking stocks and valuation.

• JP Morgan upgraded shares of FedEx Corp (NYSE: FDX) to Overweight from Neutral, citing valuation.

• Prudential upgraded Abercrombie & Fitch Co 'A' (NYSE: ANF) to Overweight from Neutral and raised their target to $89 from $66, citing valuation and easier comps.

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

MAJOR PAPERS:

• Barron's Magazine (subscription required) highlighted a number of possible M&A targets, along with a few stocks it believes to be undervalued:
• M&A is expected to continue in Europe: possible large cap targets include Barclays (NYSE: BCS), Deutsche Telekom (NYSE: DT), Deutsche Bank (NYSE: DB), ABN Amro (NYSE: ABN), Volkswagen (OTC: VLKAY), Koninklljke (NYSE: KPN) and Swisscom (NYSE: SCM); possible small-mid cap targets include Hellenic Telecom (NYSE: OTE).
  
• There may still be upside in shares of Xerox (NYSE: XRX), says James Benson, a partner and securities analyst at Harris Associates.
• Shares of YRC Worldwide (NASDAQ: YRCW) may be undervalued by as much as 50%, says Barron's "Bottom Line," which writes that shares could climb above $60.
• The Wall Street Journal (subscription required) featured an article on Pfizer's new CEO and his strategic plan.
• Pfizer's (NYSE: PFE) new CEO, Jeffrey B. Kindler, is preparing to detail his strategic vision for the company that will likely involve more job cuts.
• Hewlett-Packard (NYSE: HPQ) is claiming a nanotechnology research breakthrough that would bring big benefits in performance.
• According to a Nomura report, Sony Corp (NYSE: SNE) will reach only 75% of its global target for PlayStation 3 sales this fiscal year through March.
• The New York Times had an article highlighting the possibility of New York funding stem cell research.
• New York Governor Eliot Spitzer called for the passage of a $2B 10-year bond initiative for research and development, at least half of which would be set aside to pay for stem cell research.
• Citigroup (NYSE: C) may shorten its name to Citi and drop its umbrella logo.

OTHER PAPERS:

• The UK Times wrote that Ford (NYSE: F) may have trouble selling its Aston Martin unit after potential buyers found problems in the divisions books while doing due diligence.
• El Pais wrote that Fidel Castro is in "very grave" condition after three failed operations and complications from an intestinal infection known as diverticulitis.

MOST NOTEWORTHY: Circuit City (CC), Best Buy (BBY) and Eli Lilly (LLY) top today's list of downgrades.

• Prudential downgraded Circuit City Stores Inc. (NYSE:CC) to Underweight from Neutral, with a $22 target, citing concerns of flat-panel TV price erosion and the high cost structure as compared with Best Buy and other retailers.
• In addition, Best Buy Co., Inc. (NYSE:BBY) was also downgraded by the firm to Neutral from Overweight with a $50 target, citing third-quarter margins that were below expectations.
• Credit Suisse removed Eli Lilly & Co. (NYSE:LLY) from their U.S. Focus List.

OTHER DOWNGRADES:

• Deutsche Bank downgraded L-T-L transporters JB Hunt Transportation Services Inc. (NASDAQ:JBHT) and YRC Worldwide Inc. (NASDAQ:YRCW), citing valuation.
• Sirius Satellite Radio Inc. (NASDAQ:SIRI) was downgraded at Bernstein to Market Perform from Outperform, based on the lower subs forecasts and the fact that Sirius is more reliant in the retail after-market than competitor XM Satellite Radio Holdings Inc. (NASDAQ:XMSR).
• AG Edwards downgraded Micron Technology Inc. (NYSE:MU) to Sell from Hold, citing the DRAM pricing risk; the firm said prices are currently running at more than twice its projected trend and it sees a risk of a correction in the next few months.

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

Prudential is hitting the large electronics sellers after Best Buy numbers disappointed yesterday. The firm cut Best Buy Co., Inc. (NYSE:BBY) to Neutral and Circuit City (NYSE:CC) to Underweight.

Staples Inc. (NASDAQ:SPLS), Orthfix (NASDAQ:OFIX), and Office Max Inc. (NYSE:OMX) were all initiated with a Buy at Banc of America.

Trucker valuations are a concern at Deutsche Bank: YRC Worldwide (NASDAQ:YRCW) and J.B.Hunt (NASDAQ:JBHT) were both cut to Hold because of excessive valuation despite the private equity and management buyouts in the sector.

Keefe, Bruyette & Woods announced a competing call by starting American Express (NYSE:AXP) as an Outperform and MasterCard Inc. (NYSE:MA) as an Underperform (MA trading down almost 0.5% on this rating call).

Full list of research calls here.

Jon Ogg is a partner in 24/7 Wall St, LLC. He dows not own securities in the companies he covers.

MOST NOTEWORTHY: Notable companies downgraded today include Tyco Int'l (TYC), 3M Co (MMM) and Yum! Brands (YUM):

• Prudential downgraded Tyco International Ltd. (NYSE:TYC) to Underweight from Neutral with a $26 target, expecting catch-up reinvestment to impact near-term value after the first-quarter break-up;
• 3M Company (NYSE:MMM) was downgraded to Neutral from Overweight with a $84 target at Prudential, as they believe it will take some time for the company to regain its premium valuation as economies in Europe and North America slow;
• additionally, Wachovia downgraded Yum! Brands Inc. (NYSE:YUM) to Market Perform from Outperform, citing slowing sales momentum in the U.S. as well as the sales impact from the E. coli/Taco Bell outbreak, which could affect sales significantly.

OTHER DOWNGRADES:

• YRC Worldwide Inc. (NASDAQ:YRCW) was downgraded to Hold from Buy at Stifel Nicolaus and BB&T, and to Neutral from Outperform at Robert Baird; the downgrades reflect the slowing freight-market demand.
• Integrated Device Technology Inc. (NASDAQ:IDTI) was downgraded to Sell from Source of Funds at ThinkEquity, citing near-term trends, the softer-than-expected outlook for March and expectations for increased competition in AMBs.

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

MOST NOTEWORTHY: Notable companies from today's downgrade list include the New York Stock Exchange (NYX) and Nokia (NOK).

• JP Morgan downgraded the New York Stock Exchange Group Inc. (NYSE:NYX) to Neutral from Overweight based on valuation; they also foresee potential integration issues with Euronext.
• Nokia Corp. (NYSE:NOK) was downgraded to Hold from Add at West LB.

OTHER DOWNGRADES:

• YRC WorldWide Inc. (NASDAQ:YRCW) and Arkansas Best Corp. (NASDAQ:ABFS) were downgraded at Stephens to Underweight from Equal Weight, citing the deteriorating Less-Than-Truckload environment.
• Bear Stearns downgraded 3Com Corporation (NASDAQ:COMS) to Peer Perform from Outperform citing increased execution; Lehman Brothers downgraded 3Coms (COMS) to Underweight from Equal Weight.

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