asset allocations are reviewed and rebalanced periodically based on funded status . for 2019 , the investment strategy for plan assets is to maintain a broadly diversified portfolio designed to achieve our target of an average long-term rate of return of 5.20% ( 5.20 % ) . while we believe we can achieve a long-term average return of 5.20% ( 5.20 % ) , we cannot be certain that the portfolio will perform to our expectations