Medicine B is not a stock, but a kind of fund, belonging to a graded fund. Graded funds, also known as structured funds, are divided into parent funds and sub-funds, and are also divided into A shares and B shares. Medicine B belongs to B shares in graded funds.

The income of the parent fund in the graded fund is fixed, and the interest of the A fund is similar to that of the bond fund, but the income of the B fund depends on the parent fund, so the risk and income will be amplified, and interest will be paid to the A fund regardless of winning or losing, and the B fund is more risky.