Global Pension Index (MCGPI) is a study of pension systems used by two thirds of the world population at the same time. It makes a benchmarking assessment of pension systems, discovers certain faults of theirs, and suggests what areas require modernization so that pension benefits may be higher. Top 3 A-rated systems are stable and well-managed. They provide significant benefits to some citizens. Mercer and CFA Institute are known as the authors of this index.