1. If I live in a state with no income tax, is there any reason to prefer one of these funds over the other?
2. Is one of these funds technically safer than the other? For reference, here is the description of VUSXX:
Here is the description of VMFXX:This fund at a minimum invests 80% of the assets in debt issued directly by the government in the form of Treasury bills and in repurchase agreements fully collateralized by U.S. Treasury securities. As a government money market fund, this fund is required to invest at least 99.5% of its total assets in cash, U.S. government securities, and/or repurchase agreements that are collateralized solely by U.S. government securities or cash (collectively, government securities).
The fund invests at least 99.5% of its total assets in cash, U.S. government securities, and/or repurchase agreements that are collateralized solely by U.S. government securities or cash (collectively, government securities).