SPAXX 和FZDXX 一个很大的不同是他们的成分,FDLXX能省的州税要多很多
https://www.fidelity.com/bin-public/060_www_fidelity_com/documents/taxes/GSE-Supplemental-Letter.pdf
FDLXX Treasury Only Money Market Fund 93.63% income exempt from state tax
SPAXX Fidelity Government Money Market Fund ; 30.59% income exempt from state tax