Stocks that moved substantially or traded heavily on Wednesday:
Centene Corp., up $7.28 to $98.16
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The health insurer and Medicaid coverage provider will expand into New York by buying Fidelis Care for $3.75 billion.
Nordstrom Inc., up $2.69 to $47.74
CNBC reported that members of the Nordstrom family are getting closer to a deal to buy the department store chain.
Western Digital Corp., down $3.04 to $85.74
Toshiba said it will sell its computer memory business to a consortium, not Western Digital, which wants to buy it.
Power Integrations Inc., down $2.45 to $71.45
The company, which makes integrated circuits used for power conversion, and other electronics companies linked to Apple traded lower.
Target Corp., up $1.62 to $59.51
The retailer said it will hire 100,000 people to work over the holidays, 40 percent more than it hired in 2016.
Chesapeake Energy Corp., up 20 cents to $3.94
Natural gas companies rose as the price of the fuel increased.
Hologic Inc., down 63 cents to $37.56
Health care companies, which have led the market higher over the last month, took losses Wednesday.
Costco Wholesale Corp., up $2.95 to $162.99
Companies that make and sell household goods made larger gains than other industries.