The Algorithmic Advantage 042 - Laurens Bensdorp II - Building Strategies with Purpose
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Aug 21, 2025 Laurens Bensdorp, an architect of innovative portfolios and author of 'Trading Retirement Accounts', shares his expertise on systematic trading. He discusses the importance of combining strategies like trend following and mean reversion to create robust portfolios. Listeners will learn about Parrondo's paradox, which reveals how mixing losing investments can yield positive outcomes. Laurens emphasizes capital allocation, the dangers of over-optimization, and the necessity of maintaining diverse strategies for resilience amid market fluctuations.
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Big Trade Counts Can Mask Overfitting
- Large trade counts can give false confidence if the strategy was over-optimized initially.
- Statistical significance from many trades does not save a strategy built by abusing past data.
Design Strategies To Be Fundamentally Diverse
- Make each strategy fundamentally different (lookback, ranking, portfolio) to avoid correlated failures.
- Spread trend lengths from very short to very long to capture different market regimes.
Map Gaps With A Non-Correlation Matrix
- Use a non-correlation matrix (spreadsheet) to map which strategy slots are filled and which weaknesses remain.
- Start new ideas with a clear objective tied to a specific portfolio hole you want to fix.
