Did you also check 7 day yields (interest) in those years? SPAXX is currently 4%. But was 5% in previous years (it holds US treasuries and has a very low expens

Did you also check 7 day yields (interest) in those years? SPAXX is currently 4%. But was 5% in previous years (it holds US treasuries and has a very low expense ratio and holds its NAV) https://fundresearch.fidelity.com/mutual-funds/summary/31617H102 https://fundresearch.fidelity.com/mutual-funds/summary/31617...