I started tracking a few money market fund rates a while back. My numbers are attached for Fidelity, T Rowe Price and Vanguard. I started doing this because I found that fund companies were taking advantage of their clients not being informed about the rates they could easily get.
Jack Hough from Barrons had a nice article in Barrons this week about "Cash Sorting". Basically, are you getting the returns you should be getting from your broker or are you asleep at the wheel? His article is attached and is in this week's Barrons (2/13/23). Be aware!