PT - JOURNAL ARTICLE AU - Brian R. Bruce TI - Editor’s Letter AID - 10.3905/jii.2015.6.2.001 DP - 2015 Aug 31 TA - The Journal of Index Investing PG - 1--1 VI - 6 IP - 2 4099 - https://pm-research.com/content/6/2/1.short 4100 - https://pm-research.com/content/6/2/1.full