The Reserve Bank of India (RBI) has announced the final redemption details for the Sovereign Gold Bond (SGB) 2017-18 Series-VIII, maturing on November 20, 2025. Investors who bought at Rs 2,951 per gram will receive Rs 12,300 per unit, marking a significant gain of Rs 9,349 per unit, equating to a total return of 317% over eight years, before factoring in annual interest payments.