3i Group PLC (LSE:III) shares have been one of the best on the FTSE 100 this year and analysts at RBC Capital said they still see good value. The shares are up over 70% this year, over 200% over five years and 900% over the decade, a compound annual growth of 18% over those 10 years, with a total shareholder return of at least 10% for nine of the last 11 years. "A significant proportion of this has been driven by Action [a 3i portfolio company and European retailer], and we don't foresee a change near-term," said analyst Manjari Dhar at RBC, initiating coverage of the investment trust. He expects growth in the discount sector plus a "strong and proven" store expansion strategy to drive multiyear growth for the Benelux non-food discount retailer, which represents around half the size of 3i's portfolio.