As a household investor this rule proposal seems extremely beneficial to modernizing our free market. Volume based discounts stifle competition and promote consolidation of trades to larger dealers. With the current system in place advantages are awarded to dealers the bigger they can get and smaller dealers can be priced out of existence. How can we claim a free market system when the entire system favors the select few brokers at the top? The volume based discount has never made sense in a "free market."