"If you are not paying for the product, then you are the product."The Social Dilemma In a rare display of miscalculation, Citadel may have overplayed its hand... Here's the setup: According to Bloomberg, "Citadel Securities LLC has sued the U.S. Securities and Exchange Commission (SEC) over the regulator’s approval of an order type introduced by stock-exchange operator IEX Group Inc." Approved by the SEC in August and launched on October 1, IEX's discretionary limit order type - or, "D-Limit" - is essentially a mechanism designed to protect liquidity providers from potential adverse selection by latency arbitrage strategies - otherwise known in less polite company as getting "picked off" on the basis of stale quotes. In a comment letter, dated April 23, 2020, Citadel Securities expresses its objection to IEX's proposal, in part, because it "will broadly and indiscriminately affect myriad liquidity takers, including retail and institutional investors as well as market makers in equities and related asset classes, such as ETFs, options, and futures." (Hold that thought for a minute...) Now, [...]