PT - JOURNAL ARTICLE AU - Brian Bruce TI - Editor’s Letter AID - 10.3905/jii.2020.11.2.001 DP - 2020 Aug 31 TA - The Journal of Index Investing PG - 1 VI - 11 IP - 2 4099 - https://pm-research.com/content/11/2/1.short 4100 - https://pm-research.com/content/11/2/1.full