TY - JOUR T1 - Editor’s Letter JF - The Journal of Index Investing SP - 2 DO - 10.3905/jii.2015.6.1.002 VL - 6 IS - 1 AU - Brian R. Bruce Y1 - 2015/05/31 UR - https://pm-research.com/content/6/1/2.abstract N2 - ER -