I know the general rule of thumb is to stash your emergency fund in a HYSA, but why not a money market account if the APY is in the same ballpark? The reason I ask is I have a years worth of emergency savings in a general savings account earning 0.5%. I withdrew the money from this account to put into something earning a little bit of interest. My 401k, Roth IRA, and brokerage account are all through vanguard so I'm leaning towards putting this money into a vanguard money market account. Maybe I'm missing something here but...
-This money can be easily withdrawn from vanguard and back into my standard checking account if needed.
-any emergency expenditures that come up can be put on a credit card and then paid off once I transfer the money into my standard checking account.
Are there any major flaws in my thought process or something I'm missing? I realize vanguard money market is currently at 4.22 and could get a little bit higher by shopping around, but I'm just curious if there's any other reason an HYSA should be used over a money market fund.