By Chuck Mikolajczak
NEW YORK (Reuters) - U.S. stock index futures edged lower on Tuesday, after the Dow and S&P marched to new record highs and the Nasdaq topped the 5,000 mark for the first time in 15 years.
* The Nasdaq <.IXIC> notched its first close above the milestone 5,000 mark since March 10, 2000, buoyed by a flurry of merger activity, for only the third close above that level in the history of the index. The Dow <.DJI> and S&P <.SPX> closed at their latest records as economic data pointed to a slowly improving economy.
* Investors will look to monthly auto sales data throughout the session for signs on the health of the U.S. economy and the appetite of consumer spending. Fiat Chrysler Automobiles's
* Electronics retailer Best Buy
* Citigroup
* MannKind Corp
* European stock markets pulled back from earlier gains spurred by better-than-expected German retail sales data and merger speculation in the Portuguese banking sector, but remained near multi-year highs set in the prior session.
* Japan's Nikkei stock average <.N225> erased early gains and ended 0.1 percent lower to snap a three-day winning streak, after the yen rebounded from a three-week low against the greenback touched earlier in the session. China stocks tumbled as investor excitement over a weekend interest rate cut waned.
Futures snapshot at 7:28 a.m. EST:
* S&P 500 e-minis
* Nasdaq 100 e-minis
* Dow e-minis <1YMc1> were down 17 points, or 0.09 percent, with 9,905 contracts changing hands.
(Reporting by Chuck Mikolajczak; Editing by Chizu Nomiyama)