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## IEEE Investment Ranking Challenge

Explore methodology to identify assets with extreme positive or negative returns.

Completed
541
Submissions
207
Participants
12646
Views

#### Notice: Error in NDCG calculation in evaluation script

Posted by benharlander over 1 year ago

See comment section for details.

Posted by benharlander  over 1 year ago |  Quote

Hi everyone,

Yesterday, it was brought to our attention that there was a small, but important error in the evaluation script and random forest starter kit. (Thanks @cyga for the tip!) The calculation for NDCG was using a discount factor of $\frac{n}{n-i}$ rather than the correct $\frac{n}{n+i}$. See correct formulation for NDCG on the “Overview” tab.

This error would have affected those that have already submitted solutions through the crowdAI API.

Apologies for this inconvenience. Best of luck on the challenge!

Ben Harlander

 Data Science & Operations Research Principal Global Investors