source:[1] Binance to Adjust Portfolio Margin Collateral Ratios and Perpetual Contract Leverage Levels (https://www.techflowpost.com/newsletter/detai ...)[2] Update on the Collateral Ratio Under Portfolio Margin and the Leverage & Margin Tiers of USDS-M Perpetual Contracts | Binance Support (https://vertexaisearch.cloud.google.com/groun ...)[3] Update on the Collateral Ratio Under Portfolio Margin and the Leverage & Margin Tiers of USDⓈ-M Perpetual Contracts | Binance Support (https://vertexaisearch.cloud.google.com/groun ...)