PT - JOURNAL ARTICLE AU - Brian Bruce TI - Editor’s Letter AID - 10.3905/jii.2020.10.4.001 DP - 2020 Feb 29 TA - The Journal of Index Investing PG - 1 VI - 10 IP - 4 4099 - https://pm-research.com/content/10/4/1.short 4100 - https://pm-research.com/content/10/4/1.full