I'm determining what to do with my current emergency fund (and, apropos to the DDMS post
@Dan did on pulling money out of iBonds, what to do with the funds I eventually pull from there).
What folks need to remember:
Many people neglect to consider taxes when looking at HYSA vs MMF, and are foolishly chasing gross return and not net return.
For example, HYSA and CDs are taxed as ordinary income at your individual federal income tax rate. Assuming, as an example, 35% fed and 6.37% NJ, a 4.90% no-penalty CD from CIT will net you 2.87%. (Obviously, if you live in a lower or 0-income tax state, the numbers will differ.)
Some MMF's, however, invest in tax-advantaged securities. And on that note, I came across a great spreadsheet that considers the net rates of five of the more popular Vanguard funds that invest in tax-advantaged securities:
https://docs.google.com/spreadsheets/d/1Le96DFR_1m4BAyl8vmaiKq-Ok1UYxAGlmkuoGV_f-SI/edit#gid=1501350635.
Some of these will net me more than the 2.87% I'd get from CIT, or a HYSA.
That said, there could be an advantage to investing in a no-penalty CD in particular in that you're locked in at 2.87% if the rates go down, and you can pull out and reinvest elsewhere if rates go up. Is juicing your returns by approx half a percent by investing in one of these MMFs worth the squeeze? Up to you.