FYI: (If link doesn't work, Google article title.)
Until 2006, the New York Stock Exchange operated as a not-for-profit enterprise that focused on listing companies and facilitating stock trading. Since becoming profit driven, the Big Board has prioritised services to high-frequency traders in ways that I believe damage market integrity.
Regards,
Ted
https://www.ft.com/content/20d40032-9b0d-11e8-88de-49c908b1f264
