Stocks to Watch: CAG, RAH, DG & More

Take a look at some of Tuesday's morning movers:

ConAgra - The packaged foods maker agreed to acquire Ralcorp for $5 billion to become the biggest private label food company in North America.

Dollar General - The retailer will replace Cooper Industries to join the S&P 500 index after the close of trading Friday. The move comes as a result of Eaton's plans to acquire Cooper.

Facebook - Nomura boosted its price target on the social-networking giant to $32 from $27 a share.

Halliburton - JPMorgan raises its price target on the oilfield services company to $45 from $43 a share.

Hewlett-Packard - The tech giant was sued by an investor over the $8.8 billion writedown that the company said was related to the acquisition of its Autonomy software unit.

Corning - The glass manufacturer said it sees stronger-than-expected fourth-quarter LCD glass volume and full-year sales of its gorilla glass approaching $1 billion, thanks to robust demand for LCD televisions and other consumer electronic devices in North America and China.

Starbucks - The coffeehouse chain plans to add 800 new stores in China over the next three years, according to The Wall Street Journal.

ADT - The home security services company posted better-than-expected earnings and said its board approved a $2 billion share repurchasing program over three years.

Pfizer - The pharmaceutical company was downgraded to "neutral" from "buy" at MKM Partners.

Acadia Pharmaceuticals - The biopharmaceutical company announced successful results from the phase three trial of its drug in patients with Parkinson's disease psychosis.

—By CNBC's JeeYeon Park (Follow JeeYeon on Twitter: @JeeYeonParkCNBC)

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