And... you're FOS. "On PredictIt, another popular political betting site, Biden was trading at similar odds on Tuesday (63¢), while Trump traded at 39¢." Obviously the spreads resulted in >100. That was late July 2020 with Trump as incumbent. In Nov the spread was 57/43 in line with the electoral college win.
And it is currently April thus I am comparing it to their predictions in April. In 2016 betting markets had Hillary around 85% on election day.
PredictIt's betting was perfection in 2020. And they were at 81% in 2016 on the day before the election. Why don't you quote Dewey and Truman's odds?