NEW YORK (MarketWatch) -- Shares of the following companies made noteworthy moves in the U.S. stock market Tuesday:
Amkor Technology Inc. /zigman2/quotes/204596393/composite AMKR -2.88% shares rose 8.7% after Deutsche Bank AG hiked from hold to buy its view of the provider of tests for semiconductors.
AtriCure Inc. /zigman2/quotes/200145261/composite ATRC +2.19% shares gained more than 20% after the medical device maker said U.S. regulators had cleared its system for use in surgery treating atrial fibrillation.
British Sky Broadcasting Group PLC shares rose almost 17% as News Corp. /zigman2/quotes/201755982/composite NWSA -1.28% , the owner of MarketWatch, pursued an acquisition of the television broadcaster. Shares of News Corp. rose 7%.
CBOE Holdings Inc. /zigman2/quotes/208166986/composite CBOE +1.44% shares climbed 12% in the market debut of the Chicago Board Options Exchange.
First Solar Inc. /zigman2/quotes/209356097/composite FSLR -0.09% shares gained 9% ahead of an address Tuesday night by President Barack Obama, who could detail plans to expand the renewable energy sector. JA Solar Holdings Co. Ltd. shares were up 8.3%.
Gibraltar Industries Inc. /zigman2/quotes/204241548/composite ROCK -1.47% shares rose 9.4% after Jefferies Group Inc. upgraded the manufacturer of metal parts from hold to buy.
Jazz Pharmaceuticals Inc. /zigman2/quotes/202658513/composite JAZZ -3.72% shares advanced 6.3% after Barclays Capital Inc. raised the drug manufacturer from equalweight to overweight.
Korn/Ferry International /zigman2/quotes/209856151/composite KFY +0.15% shares rose 15.5% after the staffing company late Monday reported a fiscal fourth-quarter profit.
Zannett Inc. shares rose almost 64% after the business consultant said it closed $12.6 million in new business so far in the second quarter.
Bakers Footwear Group Inc. shares fell 36.7% after the footwear retailer reported quarterly results.
Best Buy Co. Inc. /zigman2/quotes/205918291/composite BBY +0.62% shares fell 6% after the consumer electronics retailer reported a smaller-than-expected increase in profit and sales in its first quarter. Read about soft demand in Canada.
Callaway Golf Co. /zigman2/quotes/204245174/composite ELY -1.44% shares declined 8.3% after the maker of golf clubs and other accessories late Monday forecast second-quarter revenue under expectations.
Capstone Turbine Corp. shares were off 8.7%.
GameStop Corp. /zigman2/quotes/203755179/composite GME +2.22% shares were down 5.3% after BestBuy said it was getting into the business of selling used video games. Read more about the plans of the biggest U.S. electronics retailer.
La-Z-Boy Inc. /zigman2/quotes/202858913/composite LZB -1.88% shares declined almost 17% after the recliner manufacturer's chief executive expressed caution in looking at fiscal 2011.
Smart Balance Inc. shares fell 24% after the maker of a butter-like substance trimmed its yearly sales outlook.