From Grok:

Rho Rider’s post warns of intensified market liquidations on October 13, 2025, as U.S. stock exchanges open for Columbus Day trading while banks remain closed, delaying deposit settlements until Tuesday and trapping overleveraged traders.

High exposure in leveraged ETFs and margin positions—estimated at hundreds of billions—could cascade into forced selling, echoing past holiday volatility spikes where trading volumes drop 20-30% per NYSE data, amplifying price swings.