Resolves YES if Biden endorses Kamala Harris for the Democratic nomination on the same day that he officially drops out of the race.

Resolves NO if Biden drops out but does not endorse Harris on the same day.

Resolves NA if Biden never drops out.

Update: Made this before I realized resolving NA is no longer an option. I will appeal to the mods to resolve NA if Biden does not drop out since people have already placed bets on this market. Otherwise, I will resolve to current prices (i.e. Keynesian beauty contest resolution) once Biden can no longer drop out.