Binance's SOXL perpetual mark price fell 5.9% from opening to low during the 21:00-22:00 UTC hour on Saturday, Oct. 17. All 60 sampled minute-close gaps between the mark and reference index stayed below Binance's 3% weekend limit. The reference index itself declined 3.9% from opening to the final minute close, allowing both prices to fall together. The sample cannot establish tick-by-tick compliance. The band limits the mark's distance from the index, while collateral and account-specific liquidation thresholds determine whether a leveraged position remains open.