Manifold calibration: YES-bias on at least 8/9 categories on Oct. 1st?
10
230Ṁ1818
resolved Oct 1
Resolved
NO

Manifold's calibration chart may be found here: https://manifold.markets/calibration

At the time of writing, predictions display a clear bias on YES. For example, markets with prediction 20% on average resolve YES only 15% of the time. In fact, all of the 10%, 20%, ... , 80%, 90% prediction bins exhibit a similar YES-bias.

The market will resolve YES if, when the first time I check the calibration chart on or after Oct. 1st, at least 8 of the 10%, 20%, ... , 80%, 90% bins still exhibit such a YES-bias. Bias is defined as the resolution frequence being strictly less than the market probability - e.g. the pair (20%, 19%) would count as exhibiting YES-bias but the pairs (20%, 20%) and (20%, 21%) would not.

The market resolves NO if at least 2 of the categories do not exhibit such a YES-bias. I may resolve the market N/A if the calibration chart is taken down and I cannot check the result soon on or after Oct. 1st.

I will rely on the numbers displayed on https://manifold.markets/calibration, and use just one sample. I will not be trading in this market. Trading closes on Sep. 25th.

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Looking at the graph, there are two bins (10% and 50%) that are perfectly calibrated and the 40% bin resolves YES for 42% of the questions. Hence this market resolves NO!

(I'm not sure if this is the first graph of the day, but it's the first one I looked at.)

A bit surprised by this result, and also the fact one person shifted the market probability from ~90% to <10% (correctly!).

Not sure where to ask this:

My calibration has gone from A+ -0.07 to S -0.04. Seems a bit weird? What does the grade letter mean?

predictedYES

@ChristopherRandles S is above A+

Well, obviously I have to bet YES on this, right?

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