US STOCKS-Wall St to dip at open; Nasdaq set for 4th straight fall
* Apple reportedly close to deal for Beats Electronics
* Omnicom Group, Publicis call off merger
* Rocket Fuel plunges after outlook
* Futures off: Dow 22 pts, S&P 3 pts, Nasdaq 7.25 pts (Adds Ralph Lauren, updates prices)
By Chuck Mikolajczak
NEW YORK, May 9 (Reuters) - U.S. stocks were set for a flat open on Friday, putting the S&P 500 on track to close a week of choppy trading with a slight decline, while the Nasdaq was on pace for its worst weekly decline in four.
* The S&P 500 has alternated between gains and losses each day this week, and the Nasdaq has dropped for three straight sessions - its longest losing streak since early April - as Internet-related stocks came under pressure.
* Apple Inc is close to paying a record $3.2 billion for Beats Electronics, two people with knowledge of the matter said, an expensive foray into music streaming and headphone gear. Apple shares slipped 0.7 percent to $583.91 while Internet radio provider Pandora Media Inc lost 2.5 percent to $64.52.
* A proposed $35 billion merger of U.S.-based Omnicom Group Inc and rival France's Publicis Groupe SA has been called off due to complex obstacles to molding the companies into the world's largest advertising agency. Omnicom shares lost 2.2 percent to $64.74 before the opening bell. Continuación...