Stock market crashes follow the exact same mathematical laws as the way magnets change their physical properties.
April 23, 2026
Original Paper
Transverse-Field Ising Model as a Framework for Financial Markets
SSRN · 6625481
The Takeaway
Stock market herding behaves the same way as the coupling that occurs in ferromagnetic materials. A model from quantum physics shows that independent decision-making acts like a transverse field against this herding force. Most analysts assume that markets are driven by human psychology or economic fundamentals that are unique to finance. This discovery suggests that market fragility can be measured using physics-based susceptibility tools. It implies that we might be able to predict a total market collapse by watching for the same signals we see in a cooling magnet.
From the abstract
This paper explores the transverse-field Ising model (TFIM) as a framework for understanding collective behavior in financial markets. Market participants are represented as interacting spins governed by two competing effects: ferromagnetic coupling, which drives herding, and a transverse-field that promotes independent decision-making. Under mean-field theory, the ordered and disordered phases map naturally onto trending and efficient market regimes, respectively. Coupling magnetization dynamic