> HFT changes these "beliefs in company" to "beliefs that the stock will go up" No, this is the part most everyone gets wrong about HFT. These systems make mo

> HFT changes these "beliefs in company" to "beliefs that the stock will go up" No, this is the part most everyone gets wrong about HFT. These systems make money off of volume, not price. They don't care if the price is going up or down. All they care about is that they can capture a small price delta by facilitating a trade faster than someone else and they are willing to do so for smaller fractions of a cent which makes them more attractive to all market participants, including you and your retirement funds. Their concerns are orthogonal to investors and they compete with other HFT firms and market makers.