Go to https://www.fidelity.com/mutual-funds/mutual-fund-spotlights/money-market-funds https://www.fidelity.com/mutual-funds/mutual-fund-spotlights.... Pick any

Go to https://www.fidelity.com/mutual-funds/mutual-fund-spotlights/money-market-funds https://www.fidelity.com/mutual-funds/mutual-fund-spotlights.... Pick any fund. Look at the prospectus. Note that there is a link to the "Monthly Holdings Report." [1] Which is a list of every single investment the fund makes, including the CUSIP (basically serial ID) of every bond. If people aren't willing to tell details on what you're invested in, that is considered one of the red flags that you're investing in a Ponzi scheme. [1] I'd link directly, but the final link is a downloaded PDF, so it's not as easy to copy the link.