Fund b share is a kind of fund, which belongs to graded fund. Graded funds, also known as structured funds, are divided into parent funds and sub-funds, and sub-funds are divided into A shares and B shares.

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, and the interest is stable. The income of fund B depends on the parent fund, so the risk and income will be amplified, and interest will be paid to fund A regardless of winning or losing. B fund is risky, and graded funds gradually withdraw from the market.