I thought they froze redemptions at that point.
The fund didn't disappear and was reopened IIRC.
I thought it was liquidated.
My understanding is that MMFs invest in very short term obligations so they don't have the sort of interest rate risk that SVB had with its bond portfolio.
They had a Lehman commercial paper issue.
This what I found on the busted buck Reserve Primary money market fund which as you noted had a Lehman problem:
“Shortly after Lehman filed for Chapter 11, Reserve Primary Fund, a major money market fund that held a large amount
of Lehman’s commercial paper, announced that it would be forced to “break the buck”—
that is, it could not pay its investors a full dollar for each dollar they had invested.
This triggered a run on money market funds that the Fed countered by promising to guarantee money market fund assets.”
The Fed swooped in to backstop the fund which is what I vaguely remembered. My impression is that the Fed would do that again but who knows.
Bear Stearns’ demise came when its mortgage based hedge funds blew up, with JP Morgan Chase buying the carcass.