* Valeant Pharma to buy Cephalon for $5.7 billion
* Trading volume could be light ahead of quarter end
* March ADP report expected to show private job gains
* Futures up: Dow 55 pts, S&P 6.7 pts, Nasdaq 15.25 pts
* For up-to-the-minute market news see [STXNEWS/US]
By Ryan Vlastelica
NEW YORK, March 29 (Reuters) - U.S. stock index futures rose on Wednesday as merger and acquisition activity lifted sentiment before data expected to show private-sector job creation.
* Gains may be limited by uncertainties over Japan's nuclear power situation and civil unrest in oil-producing regions. Trading volume has been weak, with Tuesday's the second-lowest of the year, suggesting shaky investor confidence as the quarter ends on Thursday.
* Canadian drugmaker Valeant Pharmaceuticals International (VRX.TO: Quote, Profile, Research)(VRX.N: Quote, Profile, Research) made an unsolicited bid to buy Cephalon Inc (CEPH.O: Quote, Profile, Research) for $5.7 billion. For details, see [ID:nN29299668]
* The bid follows AT&T Inc's (T.N: Quote, Profile, Research) recent proposed purchase of T-Mobile USA and eBay Inc's (EBAY.O: Quote, Profile, Research) bid for GSI Commerce (GSIC.O: Quote, Profile, Research), signs that stocks could be viewed as cheap.
* Dow component DuPont (DD.N: Quote, Profile, Research), the chemical company, extended its $6 billion takeover bid for Denmark's Danisco (DCO.CO: Quote, Profile, Research) by four weeks and said shareholders of 6 percent of Danisco's stock had accepted the offer. [ID:nLDE72T0BE]
* The ADP employment report, to be released at 8:15 a.m. [1215 GMT], is expected to show 203,000 private-sector jobs were created in March, fewer than in February. While the report doesn't have a high correlation with Friday's closely watched non-farm payrolls report by the Labor Department, a good ADP number could increase optimism about the labor market.
* S&P 500 futures (SPc1: Quote, Profile, Research) rose 6.7 points and were above fair value, a formula that evaluates pricing by taking into account interest rates, dividends and time to expiration on the contract. Dow Jones industrial average futures (DJc1: Quote, Profile, Research) added 55 points and Nasdaq 100 futures (NDc1: Quote, Profile, Research) rose 15.25 points.
* Family Dollar Stores Inc (FDO.N: Quote, Profile, Research) reported second-quarter earnings that rose from the prior year and were at the high end of the company's forecast, which it recently raised. [ID:nN29260008].
* Tibco Software Inc (TIBX.O: Quote, Profile, Research) fell 1 percent to $26 in light premarket trading a day after it gave a second-quarter outlook that implied slowing growth. [ID:nL3E7ET2VM]
* Toyota Motor Corp (7203.T: Quote, Profile, Research) (TM.N: Quote, Profile, Research) and Honda Motor Corp (7267.T: Quote, Profile, Research) (HMC.N: Quote, Profile, Research) took fresh steps to scale back production or reduce orders of some parts in North America after supplies were disrupted by the March 11 Japan earthquake. [ID:nN29258412]
Strength in energy lifted U.S. stocks on Tuesday as investors concentrated on adding to winning positions, but uncertainty kept trading volume light.
(Editing by Kenneth Barry)
US STOCKS-Futures rise on M&A, ADP jobs report on tap