20. Charles Schwab, chairman of the brokerage firm Charles Schwab Corporation, came out with the following statement in support of the conclusion in Michael Lewis’s book Flash Boys that markets are rigged because of high-frequency trading: “High-frequency trading is a growing cancer that needs to be addressed.” He concluded that HFT “is a technological arms race designed to pick the pockets of legitimate market participants,” and “a scam … that [regulators] should simply make illegal.” Explain whether you agree or disagree with this statement.