&gt;This means that if someone is actually slowing down market data for say AAPL then they are also slowing down quotes for AMZN as well but again<p>Why should one symbol be tied to a completely unrelated symbol? This doesn&#x27;t engender confidence in the architecture of these markets (which markets are you referring to, specifically)?<p>&gt;you start to realize that almost all HFT firms aren&#x27;t quote stuffing, they are just jockeying for position at the top of the order book.<p>I&#x27;m not sure this is an important distinction. What is quote stuffing but position jockeying?