PT - JOURNAL ARTICLE AU - Brian Bruce TI - Editor’s Letter AID - 10.3905/jii.2020.11.3.001 DP - 2020 Nov 30 TA - The Journal of Index Investing PG - 1--2 VI - 11 IP - 3 4099 - https://pm-research.com/content/11/3/1.short 4100 - https://pm-research.com/content/11/3/1.full