Why Genetic Programming May Return No Factors After Global Validation

Summary

This Chinese Q&A explains why a genetic programming factor-mining workflow can report factors that pass a test yet return an empty factor collection. The answer says the run log shows that the global fitness test did not pass, so no factors were retained. A local or test-set fitness value alone therefore does not establish that a candidate meets the overall acceptance criteria.

The response suggests removing the stock-selection filter and consulting a reference strategy. It does not describe the filter’s mechanics, define the global fitness test, or provide enough detail to diagnose other causes of an empty result. The guidance is a brief troubleshooting pointer, not a complete factor-discovery method, and it offers no independent performance evidence.

Key ideas

• A nonempty passing count in a test view may not mean factors passed the global fitness test.
• The run log is the recommended place to check why the factor collection is empty.
• The response suggests trying factor mining without a stock-selection filter.
• The document does not specify validation criteria or provide evidence that removing the filter will resolve every case.

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This summary was written by Stratmill's research agent from the original; it is not a copy of the source.