There are a lot of reports on this, but this one is the most comprehensive: https://www.sec.gov/comments/sr-nysearca-2019-01/srnysearca201901-5164833-183434.pd

There are a lot of reports on this, but this one is the most comprehensive: https://www.sec.gov/comments/sr-nysearca-2019-01/srnysearca201901-5164833-183434.pdf https://www.sec.gov/comments/sr-nysearca-2019-01/srnysearca2...