TY - JOUR T1 - Editor’s Letter JF - The Journal of Index Investing SP - 1 LP - 2 DO - 10.3905/jii.2021.12.2.001 VL - 12 IS - 2 AU - Brian Bruce Y1 - 2021/08/31 UR - https://pm-research.com/content/12/2/1.abstract N2 - ER -