U.S. stock index futures fell after Congress failed to agree on a spending plan, forcing a government shutdown and leaving hundreds of thousands of federal employees unable to work, Internet reported. The government shutdown could disrupt the S & P 500's 14% rally this year and could delay the release of key economic data, including a jobs report due for Friday. Some analysts said that if the release of non-agricultural employment data is delayed, it will increase the uncertainty caused by the government shutdown, and volatility is expected to increase after entering the new quarter. (Jin Shi)