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Is the trend in the example I cloned due to the factors chosen or how is the portfolio constructed?

Hi all of you, I'm new and I was looking at the examples of the lessons (which I haven't studied yet). Playing with the example "Long-Short Equity with the Optimize API 4" to familiarize myself with the platform I noticed that the results in the considered period are quite negative. I did several tests with various combinations for the most known factors and they all have more or less the same trend. Is this simply due to poor performance in the given period or to the way the allocation in the example is constructed? Do you know any reference values ​​for the performance of various factors (value type and momentum) analyzed with long-short portfolios?

Greetings