Throwaway because it would certainly not be kosher for me to comment on this, but: There are people who work at IEX who do not "drink the Kool Aid" and have be

Throwaway because it would certainly not be kosher for me to comment on this, but: There are people who work at IEX who do not "drink the Kool Aid" and have been critical in private industry discussions about Katsuyama's statements. Additionally, IEX actively solicits trading in their pool from HFT firms. For one, these same people understand that it is difficult to match the quality of other modern US equity markets without those participants. Moreover, it's hard to build appreciable market share (% of marketwide volume traded) without electronic trading, which is how their business makes money and grows in valuation.