Stock market today: S&P 500, Nasdaq steady as countdown to Jackson Hole begins Yahoo FinanceStocks Drift as Caution Reigns Before Jackson Hole: Markets Wrap BloombergMountain hikes, cowboy hats: Why the Fed’s Jackson Hole event is the hottest ticket in econ MarketplaceHere’s how a week’s worth of huge economic news will affect the Fed’s decision-making CNBCSNAPSHOT Wall St opens flat with focus on Jackson Hole Reuters