In his latest Substack post, Exante Data CEO Jens Nordvig takes a deep dive into the pitfalls of relying too heavily on correlation analysis in markets.
While correlations can provide useful signals, they are often unstable and easily disrupted by structural shifts, policy changes, or unexpected capital flows. Over-reliance on them risks missing the deeper drivers of macro dynamics.
To frame the discussion, Jens draws on the perspectives of some of the most influential thinkers in investing and economics:
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Ray Dalio, who famously discouraged correlation analysis at Bridgewater Associates;
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John Maynard Keynes, who warned that coefficients in econometric models are rarely stable over time;
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George Soros, whose concept of reflexivity highlights the feedback loop between market participants and outcomes.
By weaving together these perspectives with his own experiences at Goldman Sachs, Bridgewater, and now Exante Data, Jens explains why investors must go beyond simple time-series relationships. Instead, they need to take a mosaic approach—one that combines data, structural analysis, and a broader understanding of market regimes.