US STOCKS-Futures point to lower open, investors await earnings
* Dow held above 17,000 on Monday despite decline
* Alcoa to report after market close, revenue seen down
* Groupon rallies in premarket after analyst upgrade
* Futures down: Dow 26 pts, S&P 3.75 pts, Nasdaq 4.75 pts (Updates prices, adds comments from Wal-Mart executive)
By Ryan Vlastelica
NEW YORK, July 8 (Reuters) - U.S. stock index futures pointed to a lower open on Tuesday, suggesting a second day of weakness as investors continued to hold off from making big bets going into the start of corporate earnings season.
* Alcoa Inc, among the first high-profile names to report, will release its results after the market closes on Tuesday. The aluminum maker is seen posting profit growth of more than 50 percent, according to Thomson Reuters data, along with a 3.6 percent decline in revenue. The stock rose 6 cents to $14.80 in premarket trading.
* Recent U.S. economic data has been strong, following a dismal start to the year, and market participants are looking to corporate earnings for confirmation that the economy snapped back in the second quarter. Many analysts are especially looking for an acceleration in revenue growth.
* Bill Simon, the chief executive officer of Wal-Mart's U.S. division, told Reuters that while the domestic job market was improving, that wasn't giving consumers enough confidence to boost their spending. Continuación...