Because these exchanges make tons of money from these traders and criminal specialists, they just turn a blind eye. Same happened in the case of the lone spoofer, Navinder Singh Sarao. There was a five-year delay in arresting the criminal, accused of exacerbating the 2010 Flash Crash—one of the most turbulent periods in the history of financial markets. That delay placed the self-regulatory bodies such as the Commodity Futures Trading Commission (CFTC) and Chicago Mercantile Exchange & Chicago Board of Trade under scrutiny. "The CME was described as being in a "massively conflicted" position as they make huge profits from the HFT and algorithmic trading."
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