CHANGE IN RATINGS

Abbott Laboratories ( ABT) downgraded at Wachovia to Market Perform. Estimates also cut, as the company is facing several challenges at its key franchises.

Broadcom ( BRCM) initiated at UBS with Buy rating. Price target starts at $47 and FY 2008 EPS estimates set at $0.47.

BRE Properties ( BRE) upgraded at Credit Suisse to Outperform from Neutral. Cites high portfolio quality at discounted valuation. Raised target price to $65 from $50.

Celestica ( CLS) upgraded at JP Morgan from Underweight to Neutral, JP Morgan said. Valuation call, as the stock is trading near tangible book value. Downside appears limited from current levels.

FirstFed Financial ( FED) downgraded at Friedman, Billings, Ramsey from Outperform to Market Perform. $50 price target. Credit costs will likely continue to rise. Share buybacks have yet to support the stock.

Marvell Technology ( MRVL) initiated with Neutral rating at UBS. Price target starts at $18 and FY 2009 EPS estimates set at $0.27.

Nuance Comm. ( NUAN) downgraded at Citigroup from Buy to Hold. Valuation call, as the stock is up 92% year-to-date. Fundamentals remain healthy.

Sandisk ( SNDK) downgraded at Oppenheimer to Neutral. Advantages that the company has enjoyed will likely begin to unwind, heading into 2008.

TTM Technologies ( TTMI) downgraded at JP Morgan from Overweight to Neutral. Decline in the core business will not improve enough to move the stock higher in the near term. Estimates also cut.

Valueclick ( VCLK) downgraded at Citigroup from Buy to Hold. Valuation call, as the stock is within 3% of the $30 price target.

Xyratex ( XRTX) downgraded at Citigroup from Buy to Hold. $27 price target. Low-margin systems is the only business driver in the near term. Estimates also lowered.

STOCK COMMENTS / EPS CHANGES

Acergy ( ACGY) numbers raised at Jefferies. Price target lifts to $36 from $34 and FY 2008 EPS estimates upped to $1.85 from $1.80. Reiterates Buy rating.

United Health ( UNH) numbers raised at Jefferies. Price target lifts to $52 from $48 and FY 2007 EPS estimates upped to $3.51 from $3.48. Reiterates Buy rating.

Coca-Cola ( KO) numbers boosted at Citigroup. Now seen reaching $67. Estimates also raised, because of improved fundamentals in the Japanese business. Buy rating.

Life Time Fitness ( LTM) target raised at UBS. New price objective jumps to $75 from $63. Reiterates Buy rating.

Ruby Tuesday ( RT) target price cut at Credit Suisse to $22 from $30 based on "horrible" September results and outlook for next quarter. Believes there is value longer-term and reiterates Outperform rating.