Halperin explains in his scholarly article 'Non-Equilibrium Skewness, Market Crises, and Option Pricing: Non-Linear Langevin Model of Markets with Supersymmetry' that Geometric Brownian motion can create negative oscillation without a barrier to hold it back- Langevin dynamics are the key to creating the floor level of stocks and crypto. I believe that we are seeing an algorithm play out with Langevin dynamics.
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