May 2, 2026 - May 3, 2026, prices for all options plummeted significantly (e.g., 400+ dropped from 90.0c to 52.5c, 500+ from 74.5c to 32.0c). This was driven by the release of negative late-stage polling or bleak forecasts just days before the election, severely dampening market expectations for the Conservative Party's defensive performance.
April 30, 2026 - May 1, 2026, the price of the 500+ option rebounded from 54.5c to 72.5c. This was likely due to new grassroots electoral analyses as the election nears, showing the Conservative Party's defensive performance might exceed pessimistic expectations, boosting the probability of surpassing 500 seats.
April 27, 2026 - April 28, 2026, the price of the 400+ option surged from 58.5c to 85.0c, with fluctuations in the 500+ option as well. This was likely driven by new local-level polling or electoral analysis indicating that the Conservative Party's defensive performance in key wards might be stronger than previously pessimistic expectations, raising the market's baseline for their seat count.