Two floor votes have not been enough to elect a new Speaker of the House - Jim Jordan lost the first vote with 20 Republicans voting against him and the second with 22 voting against him:

So now we go to a third vote. How many Republicans will vote against Jim Jordan in the third round?

 - Jordan may or may not be the Republican nominee or he could pull out of the race before the third vote. Even if that happens, this market will still be live and will still resolve to the number of Republicans voting against him.