How many times will 538's election model change its predicted winner between today (25 Jun) and the election?
48
1kṀ16k
resolved Nov 5
100%98%
4-7 times
0.4%
0 times
0.4%
1-3 times
1.2%
8-10 times
0.4%
more than 10 times

This question concerns 538's election forecast model. Since launching on 11 June with Biden in the lead, the predicted winner has switched twice (on 14 June & 21 June). Between today (25 June) and the election (5 Nov) inclusive, how many times will the predicted winner switch under the model?

Details. Resolution is according to the "win probability" version of the model:

Ties do not count as switches.

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And here's the final count, from June 25th:

1. July 1 (to Trump)

2. July 12 (to Biden)

3. July 19 (to Trump)

4. Aug 8 (to Harris)

5. Oct 18 (to Trump)

6. Nov 4 (to Harris)

bought Ṁ150 NO

And on October 18th, we had lead switch #5, with Trump moving ahead of Harris.

The model's back, and Harris is now in the lead.

Minor issue; the Biden vs Trump projections don't seem to be available anymore at 538 to verify the older count of switches -- but the Internet Archive provides.

Thanks @SEE! Can confirm: the model is back up and there have been 4 switches between June 25 and today (Aug 23). The most recent was on Aug 8 (to Harris).

Hi @traders, 538's forecast is currently suspended, but the party's not over yet. Since June 25th with Biden leading, I count 3 switches so far (using the win probability version of the model): July 1 (to Trump), July 12 (to Biden), & July 19 (to Trump).

I assume that if it reopens with trump in the lead, that won't be a switch, and if it opens with anyone else in the lead, it will be?

Yes, that's right.

Would you mind if I duplicated this for Nate silver’s model, or would you rather do that yourself?

Great idea—it’s all yours

What if it swatches twice in one day?

Fortunately, the graph is only updated once per day. You can mouse-over the graph to see each day's estimate.

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