Here's a rephrased description: This fund routinely invests a substantial portion—at least 80% of its net assets, including any capital acquired through borrowing for investment purposes—in corporate debt instruments. The portfolio manager's objective is to keep the overall interest rate sensitivity, or duration, of its holdings generally within a span of two to ten years during typical market environments. Additionally, the fund is permitted to allocate up to 20% of its net assets to derivative products, which can include tools like currency forwards and swaps.