A bank treasurer is seeking to identify the most appropriate investment maturity strategy to apply considering the status of its balance sheet and the economic conditions it is currently facing. The treasurer gathers the following information:

• The bank faces a high interest rate environment with a flat yield curve.

• The bank's asset mix includes a high proportion of US Treasury bonds purchased years ago when interest rates were significantly lower.

• The bank has a high proportion of revenues from loans and anticipates a record high level of profitability this year.

Which of the following strategies would be the most appropriate for the bank to take in order to maintain its current level of total income?