SI378: When Prices Stop Making Sense ft. Mark Rzepczynski

This episode examines markets through the lens of uncertainty rather than prediction. As the Federal Reserve delivers a rate cut amid dissent and conflicting signals, Alan and Mark explore what it means for systematic investors navigating noisy data, fragile liquidity and shifting regimes. The conversation moves from Fed credibility and term premia to bubbles, leverage and the limits of valuation in an environment shaped by narratives as much as fundamentals. Along the way, they return to a core question at the heart of systematic investing: when uncertainty rises and explanations multiply, should prices remain the final arbiter of risk, signal and portfolio design?

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Episode TimeStamps:

00:00 - Introduction to the Systematic Investor series

00:23 - Market context and recent CTA performance

02:41 - Initial reactions to the Fed decision and rate cut

03:12 - A messy Fed and the problem of dissenting signals

06:48 - Inflation, growth projections and policy uncertainty

08:31 - Signal versus noise in systematic trading models

11:22 - Employment data revisions and confidence in fundamentals

13:10 - Bond valuation, term premia and the question of safe assets

16:30 - Fiscal dominance, inflation risk and portfolio fragility

19:29 - Prices versus value and the limits of interpretation

22:47 - Narratives, reflexivity and momentum in markets

28:07 - Bubble dynamics, leverage and wealth effects

36:51 - Credit markets, AI investment and systemic risk

41:07 - Momentum, trend following and persistent market behavior

54:36 - Total portfolio approach and adaptive asset allocation

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