CHANGE IN RATINGS

Adtran

(ADTN) - Get Report

downgraded at Morgan Stanley to Equal-weight and 2009 and 2010 estimates reduced.

Aflac

(AFL) - Get Report

downgraded at Citigroup from Buy to Hold. $50 price target. Valuation call, as risks are rising in the company's investment portfolio.

Atheros

(ATHR)

downgraded at Jefferies from Buy to Hold. $14 price target. Estimates also cut, to reflect weakness in the general semiconductor market.

BB&T

(BBT) - Get Report

downgraded at Goldman Sachs to Sell from Neutral due to exposure to Florida and Georgia. Believe real estate problems in those states are accelerating and underestimated. Price target cut to $24 from $28.

Blackrock

(BLK) - Get Report

upgraded at Morgan Stanley to Overweight from Equal-weight and is now a top pick.

Bucyrus

(BUCY)

downgraded at JP Morgan to Underweight from Neutral based on expected negative revisions to earnings through 2010. Price target at $23.

Comerica

(CMA) - Get Report

upgraded at Goldman Sachs to Neutral from Sell. Price target unchanged at $23.

Joy Global

(JOYG)

downgraded at JP Morgan to Neutral. $25 price target.

Kohl's

(KSS) - Get Report

downgraded at Merrill from Buy to Neutral. $40 price target.

NYSE Euronext

(NYX)

downgraded at Jefferies from Buy to Hold. $32 price target.

Steel Dynamics

(STLD) - Get Report

upgraded at Barclays to overweight and price target of $18 remains unchanged.

MEMC Electronic

(WFR)

downgraded at Merrill from Buy to Underperform. $16 price target. Estimates also cut.

U.S. Steel

(X) - Get Report

downgraded at Goldman Sachs to Neutral from Buy based on 17.7% gain since Dec. 8 upgrade. Price target unchanged at $41.

STOCK COMMENTS / EPS CHANGES

Caterpillar

(CAT) - Get Report

estimates cut at Morgan Stanley through 2010. Underweight rating and $31 price target.

Morgan Stanley

(MS) - Get Report

target lowered at Credit Suisse to $30 from $40. Maintained Outperform rating.

Micron

(MU) - Get Report

numbers reduced at Morgan Stanley. Shares now seen reaching $6.50. Equal-weight rating.

Nike

(NKE) - Get Report

numbers cut at Barclays. Shares now seen reaching $70. Overweight rating.

Paychex

(PAYX) - Get Report

numbers lowered at Barclays. Estimates cut through 2010. Equal-weight rating and new $28 price target.

Penn National Gaming

(PENN) - Get Report

price target up at Goldman to $25 from $23. Maintained Buy rating.

RadioShack

(RSH)

numbers cut at Merrill. Shares now seen reaching $10. Estimates also lowered. Underperform rating.

WellCare Health Plans

(WCG) - Get Report

target cut at Credit Suisse to $13 from $49 based on legal, financial and operational challenges. Maintained Neutral rating.

U.S. Steel numbers cut at Barclays. Shares now seen reaching $45. Estimates also lowered. Equal-weight rating.

This article was written by a staff member of TheStreet.com.