US futures edge higher ahead of Fed rate decision; political turmoil festers By: CNBC.com News September 26, 2018 at 04:59 AM EDT U.S. stock index futures posted slight gains ahead of Wednesday's open. Read More >> Related Stocks: Dow Industrials SPDR Nasdaq ETF S&P 500 Ishares Core ETF SPDR S&P 500 ETF Trust