SPAXX vs. FDIC: Risk Comparison & Analysis

Someone asks:

Which one is best under the Roth IRA with Fidelity. SPAXX (Fidelity Government Money Market Fund) or FDIC (Insured Deposit Sweep Program)?

Whatโ€™s the Difference Between SPAXX and FDIC?
SPAXX and FDIC are money market funds…

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