Analyst upgrades:

• Baird upgraded WinTrust (NASDAQ: WTFC) to Neutral from Underperform and raised its target to $20 from $13 citing the accretive purchase of AIG (NYSE: AIG) loans and reduced risk of a capital raise.
• Piper Jaffray upgraded Coach (NYSE: COH) to Overweight from Neutral on expectations product sell-throughs and margin trends will improve in the coming quarters. The firm has a $32 target on the stock.
• RBC Capital upgraded Campbell Soup (NYSE: CPB) to Sector Perform from Underperform and raised its target to $33 from $29. The firm cites Campbell's recent innovation, easy volume comps, and "reasonable" consensus estimates for its upgrade.
• Tata Motors (NYSE: TTM) was upgraded to Equal Weight from Underweight at Morgan Stanley.
• Rockwell Automation (NYSE: ROK) was upgraded to Buy from Neutral at BofA/Merrill.
• Fifth Third Bancorp (NASDAQ: FITB) was upgraded to Conviction Buy from Buy at Goldman.

A key part of the growth strategy at IBM (NYSE: IBM) is to buy up top-notch software companies. So, today the tech giant has struck again; that is, agreeing to purchase SPSS (NASDAQ: SPSS) for about $1.2 billion in cash.

Founded in the late 1960s, SPSS saw an opportunity to find ways to use software to turn raw data into information for decision making. Yes, in today's world, this sounds kind of basic. But 40 years ago, it was certainly pioneering.

Analyst upgrades:

• UBS upgraded Nokia (NYSE: NOK) to Buy from Neutral as it believes the company's product portfolio is recovering.
  
• Canaccord upgraded Google (NASDAQ: GOOG) to Buy from Hold and raised its target to $450 from $300. The analyst said industry checks indicate deteriorating search conditions have started to improve in late March and notes that the market is already pricing in a weak Q1.
  
• Wachovia upgraded CGI (NYSE: GIB) to Outperform from Market Perform. In addition to valuation, the firm cited the company's defensive profile, comfort with its fiscal 2009 estimates, and its expectation that the company will continue to have strong signings.
• Siliconware Precision (NASDAQ: SPIL) was raised to Overweight from Neutral at HSBC.
  
• Matrixx Initiatives (NASDAQ: MTXX) was lifted to Buy from Hold at Roth Capital.

Analyst upgrades:

• Stephens upgraded Emergency Medical Services (NYSE: EMS) to Overweight from Equal Weight on valuation as they believe shares are undervalued at current levels. The firm has a $42 target on the stock.
  
• Deutsche Bank upgraded Deutsche Telekom (NYSE: DT) to Buy from Hold ahead of the company's earnings report as they expect the results to provide confidence in the dividend.
  
• Baird upgraded CoPart (NASDAQ: CPRT) to Outperform from Neutral due to the defensive nature of the salvage auction market, strong balance sheet, and potential growth beyond salvage and outside the U.S.
• First Financial (NASDAQ: FFBC) was raised to Market Perform from Underperform at Keefe Bruyette.
  
• GPC Biotech (NASDAQ: GPCB) was upgraded at Piper Jaffray to Neutral from Sell.
  
• Smith & Nephew (NYSE: SNN) was upgraded to Buy from Hold at Citigroup.

Analyst upgrades:

• Baird expects Thor Industries (NYSE: THO) to benefit from industry consolidation and the eventual recovery. Shares were upgraded to Neutral from Underperform.
  
• Jefferies upgraded SPSS Inc. (NASDAQ: SPSS) to Buy from Hold on valuation and believes the company's cost cuts will be positive for EPS. The company's target was lowered to $28 from $29.
  
• Banc of America upgraded shares of Entergy (NYSE: ETR) to Buy from Neutral on valuation and believes the company is unlikely to spin-off Enexus by year-end. They believe a spin-off in 2009 or no spin at all suggests a higher share price from current levels. The company's target was raised to $104 from $101.50.
• AMN Healthcare (NYSE: AMN) was upgraded to hold from Sell at Citigroup.
  
• Argus upgraded Choice Hotels (NYSE: CHH) to Hold from Sell.
  
• Transdigm Group (NYSE: TDG) was lifted to Buy from Neutral at UBS.

Analyst downgrades:

MOST NOTEWORTHY: Tyson Foods, Unilever, Brooks Automation, Akzo Nobel and Yahoo! were today's noteworthy upgrades:

• Deutsche Bank upgraded shares of Tyson Foods (NYSE: TSN) to Buy from Hold on valuation and the potential for protein complex improvement.
  
• Goldman upgraded shares of Unilever (NYSE: UN) to Neutral from Sell to reflect the company's diversified product range and growing exposure to developing and emerging markets.
  
• Bear Stearns raised its rating on Brooks Automation (NASDAQ: BRKS) to Outperform from Peer Perform. The firm cited the company's compelling valuation and growth drivers.
  
• Akzo Nobel (OTC: AKZOY) was upgraded to Buy from Hold at SNS Securities, as they see absolute total return greater than 20%.
  
• CIBC upgraded Yahoo! (NASDAQ: YHOO) to Sector Outperformer from Sector Performer on valuation following the recent pullback and their analysis of Yahoo's non-operating assets. They believe Yahoo's stake in Alibaba Group is now worth about $4/share and raised their target to $31 from $28.

OTHER UPGRADES:

• First Analysis upgraded Spss Inc (NASDAQ: SPSS) to Overweight from Equal Weight.
  
• UBS upgraded Yamana Gold (NYSE: AUY) to Buy from Neutral.
  
• WestLB upgraded Alcatel-Lucent (NYSE: ALU) to Hold from Reduce.
  
• HSBC upgraded Posco (NYSE: PKX) to Overweight from Neutral.

MOST NOTEWORTHY: CheckFree (CKFR), Talbots (TLB), SPSS Inc (SPSS), Network Appliance (NTAP) and Pozen Inc (POZN) were today's noteworthy downgrades:

• Following FiServ's (NASDAQ: FISV) acquisition of CheckFree, Raymond James cut CKFR shares to Market Perform from Strong Buy and Baird downgraded shares to Neutral from Outperform.

• Talbots (NYSE: TLB) was cut to Sell from Hold at Citigroup based on valuation, continued earnings disappointments, and a lack of earnings visibility.

• Cowen downgraded shares of SPSS Inc (NASDAQ: SPSS) to Underperform from Neutral citing decelerating growth and poor earnings quality.

• Bear Stearns cut Network Appliance (NASDAQ: NTAP) to Underperform from Peer Perform on the negative Q1 pre-announcement. Pacific Crest downgraded shares to Sector Perform from Outperform.

• After Pozen (NASDAQ: POZN) received a second approvable letter for Trexima, shares were downgraded by three firms:
  
• To Neutral from Strong Buy at First Albany
  
• To Hold from Buy at Jefferies and Lazard...

OTHER DOWNGRADES:

• Oppenheimer downgraded Applebee's (NASDAQ: APPB) to Neutral from Buy.

• Gabelli downgraded Boston Beer (NYSE: SAM) to Hold from Buy.

• Lehman downgraded Luxottica (NYSE: LUX) and Clorox (NYSE: CLX) to Equal Weight from Overweight.

• Thomas Weisel downgraded Nortel Networks (NYSE: NT) to Market Weight from Overweight.

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