NEW YORK, Aug 4 (Reuters) - U.S. stock index futures briefly added losses on Tuesday following a mixed report on June personal consumption and expenditures.
* While consumer spending rose slightly more than expected in June, personal income declined by a greater-than-expected 1.3 percent, the biggest decrease since January 2005, the Commerce Department said.
* S&P 500 futures fell 6.50 points and were 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 shed 58 points, and Nasdaq 100 futures were down 10.75 points.