There are many investment index grading funds. The easiest way to judge whether it is a parent fund is to see if there are letters after the fund name. The parent fund without letters, and the sub-fund with letters. The letter A is Grade A and the letter B is Grade B..

Graded fund refers to a fund whose basic share is divided into two sub-shares of A/B with different expected risk and return by agreeing on the risk and return distribution of the fund in advance. A-share investors get fixed agreed income, while B-share investors enjoy income or take risks after paying the agreed income of A-share, and some or all of them can be listed and traded.