Friday's Analysts' Upgrades and Downgrades

Medco Health Solutions(MHS Quote) initiated with Hold rating at Jefferies. Price target starts at $64 and 2007 EPS estimates set at $3.16.

Microsoft(MSFT Quote) estimates raised at UBS. Price target lifts to $35 from $34. 2007 eps estimates rise to $1.47 from $1.45. Reiterates Buy rating.

Credit Suisse said it is raising its target price on Northrup Grumman(NOC Quote) to $75 from $70. Sees fewer risks to outlook following Q4 results. Maintained Neutral rating.

Credit Suisse said it is raising its target price on Nucor(NUE Quote) to $65 from $55 following Q4 results. Believes strong operating results are already priced in to shares. Maintained Neutral rating.

Texas Instruments(TXN Quote) estimates raised, UBS said. Price target lifts to $40 from $38. 2007 EPS estimates rise to $1.70 from $1.66. Reiterates Buy rating.

Credit Suisse said it is raising its 2007 EPS estimates on Western Digital(WDC Quote) by 3 cents to $1.90 following solid Q2 results. Maintained $27 target price and Outperform rating.

MEMC Electronic(WFR Quote) numbers spike up at UBS. Price target rises to $73 from $60. 2007 EPS estimates jump to $3.00 from $2.55. Reiterates Buy rating.