Vanguard settlement fund has 49.37% US obligations, Fidelity is 41.18%.
其他funds也有。
https://investor.vanguard.com/investor-resources-education/taxes/funds-tax-information
Vanguard funds that held U.S. government bonds (i.e., government obligations) (PDF)
https://www.fidelity.com/tax-information/fidelity-mutual-fund-tax-information
2023 Percentage of Income from U.S. Government Securities