Overvaluation Meets Macro Risk: Why This Massive Asset Manager is Getting Bearish | Jim Masturzo | Research Affiliates

Jim Masturzo of Research Affiliates delivers a stark warning: the market isn't just overvalued—it's in the grip of a dangerous feedback loop where AI narratives are inflating valuations beyond any historical precedent. With the US CAPE ratio at 40—near its all-time high of 44 and more than double the long-term average of 18—Masturzo argues that the market is pricing in decades of sustained AI-driven earnings growth that may never materialize. He identifies a critical flaw in investor psychology: the overreliance on analyst earnings expectations, which are notoriously poor predictors of actual results and are prone to momentum-driven overextrapolation. The real danger, he says, isn't just valuation—it's the collapse of the 60-40 portfolio model, as stocks and bonds now move in tandem due to rising yields, rendering traditional diversification ineffective. Yet, paradoxically, Masturzo sees a powerful opportunity in commodities, particularly agricultural and energy, driven by a prolonged crisis in the Strait of Hormuz that could keep global supply chains broken for months. He also highlights a tactical window in long-duration bonds, suggesting that yields in the upper 4s present a buying opportunity, especially if a commodity shock triggers a market selloff. His core message: the era of passive, long-term holding is over.