Opinions on this matter differ. I offered mine here:
I posted that on the CD thread because, as you point out, those are short CDs and not (supposedly) liquid funds. But your post raises implicitly a much larger point:
Given the shape of the yield curve now, the traditional bright line between liquid funds and (even short) longer term CDs is becoming blurred. This is forcing us all to make a choice, with the usual and customary “rules” having become a bit smudged. Here, again, everyone will have a different opinion and approach. I wrote about my own approach in response to another of your questions, here:
Approaches will differ. Here is mine.
I wish I knew with certainty the right answers. But my crystal ball is muddier than hell.