CAIA LEVEL 2 Sample exam 질문드립니다. (Institutional Asset Owners and Investment Policies 과목)

Institutional Asset Owners and Investment Policies 과목입니다.

Firm XYZ's defined benefit pension plan has a projected benefit obligation (PBO) of $100 million and current assets of $100 million. The duration of the pension's liabilities is 10.0 years, while the fund's assets are entirely comprised of a 5.0-year, zero-coupon riskless bond. Assume that all interest rates of all maturities and credit-worthiness immediately rise by 1.0%. Which of the following situations best describes the plan's funded status after the interest rate changes

답이 5% overfunded인데 이 부분에 대해서 설명을 부탁드리겠습니다.

감사합니다.