ACE, Dycom, Chemours, Kraft and Melco are big market movers

Stocks that moved substantially or traded heavily Wednesday on the New York Stock Exchange and the Nasdaq Stock Market:

NYSE

ACE Ltd., up 81 cents to $102.49

The insurance company is buying The Chubb Corp. in a $28.3 billion cash-and-stock deal to boost its international presence.

Dycom Industries Inc., up $4.63 to $63.48

The contracting services company raised its fourth-quarter profit guidance and announced a plan to buy back $40 million in stock.

Chemours Co., up 51 cents to $16.51

The global chemical company completed its spinoff from DuPont and launched as an independent, publicly traded company.

Montpelier Re Holdings Ltd., up $1.74 to $41.24

The insurance and reinsurance company said its shareholders voted in favor of the proposed merger with insurer Endurance.

Xerox Corp., up 4 cents to $10.68

The document management technology company completed the sale of its information technology outsourcing business to Atos.

Nasdaq

Kraft Foods Group Inc., up $3.16 to $88.30

The food and beverage company said that its shareholders approved the sale to H.J. Heinz and the deal will close Thursday.

Melco Crown Entertainment Ltd., up 82 cents to $20.45

The operator of casinos and resorts in Asia got a boost following the release of gaming revenue figures from Macau.

Synergy Pharmaceuticals Inc., up 80 cents to $9.10

The drug developer appointed pharmaceutical industry veterans Timothy Callahan and Richard Daly to its board of directors.