Enhancing Liquidity in Fixed Income Portfolios

As a fixed income portfolio manager at a bond investment firm, you are evaluating the liquidity management strategies of your portfolio. Recently, you noticed increased volatility in the market, which may affect the ability to quickly sell some securities without significant price concessions.

Your primary goal is to ensure that your portfolio maintains adequate liquidity to meet potential redemption requests or investment opportunities. In this context, which of the following strategies would be the *most* effective in enhancing the liquidity of your fixed income portfolio?