By Angela Moon
NEW YORK (Reuters) - Stock index futures slipped on Friday as investors turned cautious ahead of a report expected to show slowing growth in the U.S. economy in the second quarter.
The Commerce Department's gross domestic product (GDP) report, the first estimate of economic growth for the April-June period, is due at 8:30 a.m. EDT.
The data is expected to show growth slowing in the second quarter as a capital investment drive by business was sated by imports and consumer spending tapered off.
Investors have been rattled by disappointing data recently, and more are talking about the possibility of a double-dip recession.
"The fear of a double-dip recession is pretty much alive in the market now. If the GDP comes in line with expectations, that might alleviate some of the fear, but if it doesn't, that could be concerning," said Peter Cardillo, chief market economist at Avalon Partners.
The consensus forecast from a poll of economists by Reuters sees second-quarter GDP growth at 2.5 percent.
Other data on tap include the Chicago PMI for July at 9:45 a.m. and a final July reading of the Reuters/University of Michigan consumer sentiment index at 9:55 a.m. Economists in a Reuters survey expect a lower reading of 56.5 for the Chicago business barometer index and a slight rise to 67 for the consumer sentiment index.
S&P 500 futures fell 5.3 points and below 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 fell 35 points and Nasdaq 100 futures lost 5.75 points.
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The S&P 500 fell for a third straight day on Thursday and ran into resistance around its 200-day moving average as investors searched for a catalyst to take stocks higher.
(Reporting by Angela Moon; Editing by Padraic Cassidy