Nov 27 (Reuters) - Some U.S. stocks to watch on Tuesday:
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U.S. stock index futures were little changed on Tuesday as worry over the threat to the economy posed by the "fiscal cliff" offset optimism from a deal to ease Greece's debt burden. S&P 500 futures were up 0.01 percent, Dow Jones industrial average futures were down 0.07 percent, while Nasdaq 100 futures were up 0.17 percent.
** ACADIA PHARMACEUTICALS INC, Monday close $2.30, up 200 pct premarket
The biopharmaceutical company said its antipsychotic drug for Parkinson's disease patients succeeded in meeting the primary goal and key secondary goals of a pivotal late stage clinical trial.
** CONAGRA FOODS Inc, Monday close $28.29, up 6 pct premarket
** RALCORP HOLDINGS INC, Monday close $70.23, up 26 pct premarket
Long-time suitor ConAgra Foods Inc finally sealed a deal to buy Ralcorp Holdings for $5 billion to become the biggest private label food company in North America.
** CORNING INC, Monday close $11.35, up 8 pct premarket
The specialty glass maker said it expects full-year sales of its Gorilla glass, used in smartphones and tablets, to approach $1 billion.
**CROCS INC, Monday close $12.75, up 4 pct premarket
Goldman Sachs initiated coverage of the shoemaker with a "buy" rating and price target of $17, according to StreetInsider.com.
** ADT CORP, Monday close $43.1, up 4 pct premarket
The home security services provider said price increases helped lift sales and earnings in its initial quarter as an independent company.
** FACEBOOK INC, Monday close $25.94, up 1 pct premarket
Nomura Equity Research raised its price target on the social media company's stock to $32 from $27, citing faster-than-expected mobile advertisement growth in the third-quarter.
** DOLLAR GENERAL CORP, Monday close $51.11, up 3 pct premarket
The discount retailer will join the S&P 500 after the close of trading on Nov. 30, and will replace Cooper Industries Plc , acquired by U.S. industrial manufacturer Eaton Corp .
Citi Investment Research analyst Deborah Weinswig said once added to the S&P 500, passive indexers will need to buy 29.2 million shares, which would drive about 6 percent increase in the stock price.
** GENERAC HOLDINGS INC, Monday close $32.01, up 6 pct premarket
The generator maker said late on Monday that it was withdrawing a secondary offering of its shares "due to market conditions".
Shares of Generac had fallen 7 percent during business hours on Monday after it reported the offering of 11.5 million shares.
** HEWLETT-PACKARD, Monday close $12.74, down 0.5 pct premarket
The world's largest PC maker was sued on Monday by an investor who claimed the company knew statements about its Autonomy acquisition were misleading and led the stock to fall, according to lawyers representing the plaintiff. (Compiled by Maria Ajit Thomas in Bangalore)