Margin Period of Risk strengthened, requiring longer MPOR assumptions and scaled-up initial margins to address liquidation risk. The circular mandates a minimum Margin Period of Risk (MPOR) of two days or higher per product based on liquidity, requiring Clearing Corporations and Exchanges to scale up initial and exposure margins via an expanded Price Scan Range (PSR) for computing Worst Scenario Loss; it also standardises PSR for index contracts and raises the Short Option Minimum Charge.