The thing with quote stuffing is this: - If a firm is posting quotes that they have no intention of honoring, then they are backing away and that's already a v

The thing with quote stuffing is this: - If a firm is posting quotes that they have no intention of honoring, then they are backing away and that's already a violation of regulations. - If they are rapidly posting quotes and canceling them in response to quickly changing market conditions, that's normal behavior. As long as a firm fills an order appropriately, when someone actually hits their quote, then they are doing it right. Of course, some exchanges and other venues view excessive quoting with minimal actual trading as a nuisance, because it taxes their infrastructure without the actual trading that makes money for everyone involved. As such, many venues are charging fees to participants who have very high quote-to-trade ratios. This is also fine - it's the prerogative of the venues to charge fees for use of the infrastructure.