Stocks that moved substantially or traded heavily Tuesday:
Facebook Inc., down 50 cents to $164.91
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The co-founders of Facebook's Instagram unit said they are resigning from the company.
Sonic Corp., up $6.85 to $43.46
The drive-in restaurant chain agreed to be bought by the parent of Arby's and Buffalo Wild Wings for $1.57 billion.
CenturyLink Corp., down $1.85 to $21.05
The communications company said Chief Financial Officer Sunit Patel is taking a job at T-Mobile USA.
Ascena Retail Group Inc., up 47 cents to $4.48
The clothing retailer posted a larger fourth-quarter profit and stronger sales than analysts expected.
Halliburton Co., up 30 cents to $41.36
Energy companies continued to rise along with oil prices.
XO Group Inc., up $7.27 to $34.91
The newlywed and pregnancy website operator agreed to be bought by the owners of competitor WeddingWire for $907 million.
Southern Co., down $1.10 to $42.73
Utilities and other high-dividend stocks slipped as bond yields continued to climb.
Southwest Airlines Co., down 41 cents to $61.65
Airlines and other transportation companies fell sharply for a second day as oil prices kept increasing.