Covidien, RadioShack, Apple, Gaylord Entertainment among big market movers Tuesday

Covidien, RadioShack, Apple among big movers

NEW YORK — Stocks that moved substantially or traded heavily Tuesday on the New York Stock Exchange and Nasdaq Stock Market:

NYSE:

Covidien PLC, down $1.15 at $41.24

Covidien said it is buying medical device maker ev3 for $2.6 billion in cash as it continues to revamp its business.

Gaylord Entertainment Co., down $1.28 at $25.31

An analyst said costs to repair massive flood damage to the company’s flagship property may be higher than expected.

RadioShack Corp., up 57 cents at $21.01

A newspaper said private equity firms were bidding to acquire the consumer electronics chain after months of buyout rumors.

Tenet Healthcare Corp., down $1 at $4.72

The hospital operator confirmed it has started talks about acquiring an Australian hospital corporation.

Rogers Corp., up 24 cents at $28.80

The company, which makes parts for electronics and aerospace manufacturers, raised its second-quarter outlook.

NASDAQ:

CombiMatrix Corp., down 48 cents at $2.27

The biotechnology company will stop seeking a buyer for it or its assets as it focuses on growing its diagnostics services business.

Apple Inc., up $3.95 at $260.83

The company said iPads sales topped 2 million since the tablet computer launched almost two months ago.

CDC Software Corp., down 23 cents at $8.31

The business software maker said earnings in 2010 and 2011 will be lower than what Wall Street expects, but revenue will be higher.