Editor's Note: Green and red arrows refer to intraday stock price movement.

NEW YORK (

TheStreet

) --

CHANGE IN RATINGS

AK Steel

(AKS) - Get AK Steel Holding Corporation Report

upgraded at Dahlman Rose from Hold to Buy. $22 price target. Company is seeing higher volumes and is keeping a tight lid on costs.

Emerson Electric

(EMR) - Get Emerson Electric Co. Report

upgraded at Oppenheimer from Perform to Outperform, Oppenheimer said. $74 price target. Company continues to grow its business in the emerging markets.

First Solar

(FSLR) - Get First Solar, Inc. Report

upgraded at Kaufman from Hold to Buy, Kaufman Bros. said. $165 price target. Stock is down 25% from January highs and the company will likely emerge as a clear winner in the solar industry.

Federal Signal

(FSS) - Get Federal Signal Corporation Report

downgraded at BMO from Outperform to Market Perform, BMO Capital said. Valuation call, based on a $7 price target.

Graphic Packaging

(GPK) - Get Graphic Packaging Holding Company Report

rated new Buy at Goldman. $6.25 price target. Company is operating in a favorable price environment and is keeping a lid on its costs.

Graham Packaging

( GRM) downgraded at Goldman from Buy to Neutral, Goldman Sachs said. $24 price target. Valuation call, as the stock is up 38% over the past two weeks.

Helix Energy

(HLX) - Get Helix Energy Solutions Group, Inc. Report

downgraded at Morgan Stanley to Equal-weight, Morgan Stanley said. $18 price target. Valuation call, as the stock is up 50% over the past three months.

Hospira

(HSP)

downgraded at Citi to Sell from Hold. Solid 1Q11 upside and new $1 billion buyback program, Citigroup noted. Price target increased to $54 from $52.

Jacobs Engineering

(JEC) - Get Jacobs Engineering Group Inc. (J) Report

upgraded at BMO from Market Perform to Outperform, BMO Capital said. $60 price target. Company is seeing better demand from key end markets.

Lorillard

(LO)

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upgraded at Citi to Buy from Hold on strong 1Q11 results, improving fundamentals, Citigroup said. Price target jumps to $122 from $90.

Lexmark

(LXK)

downgraded at Citi to Hold from Buy. Growth/margin trade-off yielding no EPS growth, Citigroup said. Price target cut to $36 from $55.

Lexmark

(LXK)

downgraded at Brean from Buy to Hold, Brean Murray said. Company is facing new sales and margin headwinds.

Nokia

(NOK) - Get Nokia Oyj Sponsored ADR Report

rated new Hold at ThinkEquity. $8 price target. Company faces a long transition from its legacy Symbian products.

Northwest Bancshares

(NWBI) - Get Northwest Bancshares, Inc. Report

downgraded at FBR from Outperform to Market Perform, FBR Capital Markets said. Valuation call

Qualcomm

(QCOM) - Get QUALCOMM Incorporated Report

rated new Buy at ThinkEquity. $5 price target. Company is the best large-cap chip play on smartphones and tablets.

Roper Industries

(ROP) - Get Roper Technologies, Inc. Report

numbers boosted at Morgan Stanley. Shares of ROP now seen reaching $88, according to Morgan Stanley. Estimates also upped, as higher sales is driving margin expansion. Equal-weight rating.

Roper Industries

(ROP) - Get Roper Technologies, Inc. Report

downgraded at Oppenheimer from Outperform to Perform, Oppenheimer said. Valuation call.

Riverbed Technology

(RVBD)

rated new Outperform at Morgan Keegan. $45 price target. Company is a market leader and is expanding its commercial footprint.

Safeway

(SWY)

downgraded at Jefferies from Buy to Hold, Jefferies said. Store manager survey showed worsening near-term trends. $25 price target.

US Steel

(X) - Get United States Steel Corporation Report

downgraded at Goldman from Buy to Neutral. $56 price target. Estimates also cut, to match the company's new guidance.

End of report.

This article was written by a staff member of TheStreet.