Here's a calculation I ran earlier.
August 17 2020 close:
FNMA $2.28, FMCC $2.26, FNMAS $9.06, FMCKJ $8.97
Today's close:
FNMA $2.35, FMCC $2.27, FNMAS $10.74, FMCKJ $10.10
Data can be cherry-picked anywhere. And I only had to go back 3 months!
Today's price movement is no more a vindication of a disproportionate common weighting than yesterday's was for prefs.