system
A chat on subreddit /r/wallstreetbets
human
I'm retarted so this may be totally wrong, but sounds like someone was short lots of 2 yr treasuries and had to buy to cover, dropping the % yeild below the yeild of the 1 year.  Should correct itself (people selling 2 years and buying 1 yrs), but interesting nonetheleas.

gpt
MMs at their best