From Thesis to Position: The Practitioner Alpha Pipeline

Renaissance Technology spent years sitting on working alpha signals before portfolio construction improved enough to turn a good Sharpe ratio into a great one. The gap between having an edge and extracting it profitably is the practitioner's core problem. This note maps the eight problems every equity long-short portfolio manager must solve — in sequence, because each stage of the pipeline constrains the next. Failing to think clearly about even one of them is sufficient to destroy a strategy that has genuine stock-picking ability.

1. The eight problems
2. The pipeline is a system