这个我读的不是很明白，请问那位大神可以解释一下呀？谢谢

When Ricki Marks sells mortgage-backed derivatives called interest-only strips (IOs) to her public pension plan clients, she describes them as "guaranteed by the U.S. government." Purchasers of the IOs, however, are entitled only to the interest stream generated by the mortgages not the notional principal itself. The municipality's investment policies and local law require that securities purchased by the public pension plans be guaranteed by the U.S. government. Although the underlying mortgages are guaranteed, neither the investor's invest¬ment nor the interest stream on the IOs is guaranteed. When interest rates decline, causing an increase in prepayment of mortgages, the interest payments to the clients decline, and the clients lose a portion of their investment.

Comment: Marks violated Standard I(C) by misrepresenting the terms and character of the investment.