Wednesday's Analysts' Upgrades and Downgrades

RF Micro Devices (RFMD Quote) estimates raised at Credit Suisse: Credit Suisse is raising its 2007 EPS estimates on RFMD to 36 cents from 29 cents following strong results and good guidance. Maintained $9 target price.

Seagate (STX Quote) estimates raised at Prudential: Prudential is raising its 2007 estimates on STX by 15 cents to $1.60 a share following December quarter upside. Maintained Underweight rating.

Sun Microsystems (SUNW Quote) estimates raised at Goldman: Goldman is increasing its 2007 estimates on SUNW by 3 cents to $0.13 based on strong quarterly results. See 7.5% operating margin later this year, with continued business momentum and slight rebound in storage. Maintained Neutral rating and $6.50 target.

Sun Microsystems numbers raised at UBS: SUNW numbers raised at UBS. Price target upped to $8.25 from $7. 2007 EPS estimates lifts to $0.11 from $0.08. Reiterates Buy rating.

Advanced Micro Devices (AMD Quote) numbers lowered at UBS: AMD numbers lowered at UBS. Price target drops to $15 from $16. 2007 EPS estimates lowered to $0.30 from $0.88. Reiterates Reduce rating.

US BioEnergy (USBE Quote) initiated with Neutral rating at UBS: USBE initiated with Neutral rating at UBS. Price target set at $15 and 2007 EPS estimates at $0.16.

United Technologies (UTX Quote) numbers raised at Jefferies: UTX numbers raised at Jefferies. Price target lifts to $72 from $70. 2007 EPS estimates bump up to $3.71 from $3.70. Reiterates Buy rating.