Liquidity Management in Fixed Income Portfolio

As a fixed income portfolio manager, you are assessing the liquidity needs of your portfolio. Your portfolio consists mainly of corporate bonds, some treasuries, and a small allocation to municipal bonds. Your client has certain cash flow needs approaching in the next year, and you are considering how to manage the liquidity of this portfolio to ensure you can meet these needs while still striving for optimal performance.

Given this context, which of the following actions would be the most effective for managing liquidity in this fixed income portfolio?