The Retail Flow Factor: Hiding in Plain Sight

In this introduction to the 17-page, 21-exhibit presentation – Part III of Alphacution’s case study on payment for order flow (PFOF) – we present our preliminary development of the “retail flow factor” for 2020 based largely on a reconciliation of 606 data (from 10 retail brokers / 11 entities) and 605 data (from 7 wholesale market makers). The results include estimated monthly penetration of retail order flow relative to the full U.S. cash equities market for 2020 – including estimated breakdowns of odd lots and round lots – as well as some hints on where we will need to look next to further refine this factor in preparation for extending this analysis throughout 2021 and beyond…