Effect of Inflation on Stochastic Optimal Investment Strategies for DC Pension under the Affine Interest Rate Model

Abstract

In this paper, we seek to investigate the effect of inflation on the optimal investment strategies for DC Pension. Our model permits the plan member to make a defined contribution, as provided in the Nigerian Pension Reform Act of 2004. The plan member is free to invest in risk-free asset and two risky assets. A stochastic differential equation of the pension wealth that takes into account certainly agreed proportions of the plan member's salary, paid as a contribution towards the pension fund, is presented. The Hamilton-Jacobi-Bellman (H-J-B) equation, Legendre transformation, and dual theory are used to obtain the explicit solution of the optimal investment strategies for CRRA utility function. Our investigation reveals that the inflation has significant negative effect on optimal investment strategy, particularly, the CCRA is not constant with the investment strategy since the inflation parameters and coefficient of CRRA utility function have insignificant input on the investment strategy.

Pension Fund Investments and Capital Market Development in Nigeria: The Moderating Role of Inflation

“…Also, Sani et al (2022) found a negative and statistically significant link between inflation and pension contributions in the long and short. Similarly, Njoku and Osu (2019) reported that inflation has a significantly negative effect on the optimal investment strategy of pension plans. Estrada et al (2017) argued that inflation strongly affects any pension system in the long run (Estrada et al, 2017).…”