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SI249: Unfulfilled Expectations in 1st Half of 2023 ft. Mark Rzepczynski

Top Traders Unplugged

00:00

The Failure of Models Problem

The failure of models problem is the biggest challenge for any quantitative analyst more so than when you're sort of saying, okay, did I pick the right entry or exit is it? So one person might say to say, well, I always want to choose the high sharp ratio and we'll just sort of say that the out of sample return is just bad luck. And then as you move forward, you don't know whether that's the actual best set of parameters. But at the very least, you want to make sure that your training performance is similar to your actual performance.

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