Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and Nasdaq Stock Market:
Community Health Systems Inc., down $14.41 at $25.89
The hospital operator is being sued by Tenet Healthcare Corp. for allegedly bilking Medicare.
Energizer Holdings Inc., down $1.67 at $70.19
The battery maker was downgraded to "Neutral" from "Buy" by UBS Investment Bank which sees margins being squeezed.
Tenet Healthcare Corp., down $1.11 at $6.44
The hospital operator is in a legal fight Community Health Systems Inc. which is pursuing a takeover bid of Tenet.
Tyco International Ltd., up $1.57 at $48.72
Bloomberg reported that France's Schneider Electric is eyeing a takeover bid of the industrial conglomerate.
Biogen Idec Inc., up $5.26 at $78.55
A clinical trial showed that the biotechnology company's multiple sclerosis drug candidate showed promising results.
Global Crossing Ltd., up $10.17 at $24.97
Level 3 Communications Inc. said it will buy the telecommunications company in a deal valued at about $2 billion.
Novellus Systems Inc., down 81 cents at $34.06
RBC Capital downgraded the company on the anticipation of a couple of "choppy" quarters for the entire computer chip sector.
Tasty Baking Co., up $2.36 at $3.97
The maker of Tastykakes and other packaged sweets is being bought by food company Flowers Foods Inc. for $34.4 million.