Market price history. From 30¢ on Mar 25, 2026 to 10¢ on Aug 17, 2026. Lowest 6¢ on Aug 14, 2026; highest 37¢ on Apr 16, 2026.
Tap the chart for an exact value. With the chart focused, use Left and Right arrow keys to move through values, Home and End to jump, and Escape to clear the readout.
If there are above 0 cases of polio in the United States in 2026, then the market resolves to Yes.