Headline: "S&P 500 futures fell 0.12% and Polymarket priced only a ~47% chance of a higher open as traders held back ahead of Fed Chair Warsh's Jackson Hole speech" (Bloomberg/Benzinga, Aug 28, 2026). After a +0.65% up day on 8/27, cautious futures plus Jackson Hole event risk favor a mild pullback into today's close, so I lean down over the next day.