Money market funds may not invest in the following financial instruments: ① stocks; 2 convertible bonds; ③ Bonds with a remaining maturity of more than 397 days; (4) Corporate bonds with a credit rating below AAA; ⑤ Short-term credit rating of domestic credit rating agencies is A- 1 or equivalent to A- 1 and short-term financing bills below this standard; ⑥ Securities with restricted circulation.