According to international practice, the credit rating of joint credit rating for money market funds ranges from AAAM to DM, where M stands for money market fund, which is used to distinguish it from bond credit rating. The meaning of each level is as follows:

AAAm is extremely safe. The fund has super strength to maintain the original asset value, and the risk of loss is limited.

AAm is very safe. The fund has strong ability to maintain the original asset value, and the risk of loss is limited.

Am is safe. The fund has good strength to maintain the original asset value, and the risk of loss is limited.

BBBm is generally safe. The Fund has the appropriate strength to maintain the original asset value, and the risk of loss is limited.

Dm fund can't keep its original asset value. The existing or potential risk exceeds 5% of the net asset value.