NEW YORK (AP) — Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and the Nasdaq stock market:
Questar Corp., up $4.60 to $24.99
Dominion Resources is buying the energy company for about $4.4 billion.
Aetna Inc., up $1.53 to $103.37
The health insurer reported a 38 percent surge in fourth-quarter profit that topped Wall Street expectations.
Chipotle Mexican Grill Inc., up $19.67 to $472.64
The Centers for Disease Control and Prevention declared an end to the restaurant chain's E. coli outbreak.
HSBC Holdings PLC, down 45 cents to $34.95
The bank is implementing pay and hiring freezes globally as a cost-saving measure, according to report from Reuters.
Credit Suisse Group AG, down 46 cents to $17.34
The bank and Barclays are paying a combined $153.4 million to settle government investigations over "dark pool" trading.
Nokia Corp., down 86 cents to $6.34
The telecommunications equipment company settled a dispute with Samsung and gave a disappointing patent revenue outlook.
Alere Inc., up $16.91 to $54.11
Abbott Laboratories is buying the maker of tests used to diagnosis the flu, HIV, and several other diseases for $4.8 billion.
Destination XL Group Inc., up 33 cents to $4.63
The retailer of men's apparel raised its fiscal 2015 earnings and revenue outlook and will report full results on March 18.