S&P 500 Bullish Odds Slump as Trump Threatens Hormuz Tolls

Amid escalating geopolitical tensions weighing on global risk appetite, the probability of the S&P 500 opening higher has dropped to 28% according to Polymarket data. This decline follows threats from President Trump to impose transit tolls on the Strait of Hormuz, marking a significant escalation in risks surrounding global energy supplies. Furthermore, the stalling of peace talks in Switzerland has added further downward pressure on market sentiment ahead of the opening bell.

These threats emerge at a sensitive time for global markets, as investors closely monitor potential supply chain disruptions in vital maritime corridors. In comparison to Asian market performance, sentiment was already dampened by mixed Chinese data, with retail sales in China contracting by 0.6% year-on-year per official data (June 16, 2026). Analysts suggest that tolls on the Strait of Hormuz could spike shipping and insurance costs, exacerbating the inflationary pressures central banks are currently fighting.

Traders should watch volatility levels in U.S. index futures as the market awaits key economic data, including U.S. Building Permits and Housing Starts (scheduled for June 16, 2026). Additionally, the results of the 20-year Bond Auction will have a direct impact on Treasury yields and equity valuations. Should the diplomatic deadlock in Switzerland persist, the S&P 500 may test new support levels as investors rotate toward safe-haven assets.