Large corporations, hedge funds, Market Makers, and other well funded entities have too much leeway when it comes to rules as it is. Freeing them to bend and twist rules to their needs is in direct opposition to a fair and balanced market. Anything that hinders objectivity, clarity, accountability, and obligation should never be allowed. Modifying parameters for margin requirements due to volatility only helps those that wish to have no consequences for their poor or illicit actions. Do not add rules that allow bad actors leeway when they should be held accountable for their trading practices.