PT - JOURNAL ARTICLE AU - Brian Bruce TI - Editor’s Letter AID - 10.3905/jii.2015.5.4.002 DP - 2015 Feb 28 TA - The Journal of Index Investing PG - 2--2 VI - 5 IP - 4 4099 - https://pm-research.com/content/5/4/2.short 4100 - https://pm-research.com/content/5/4/2.full