Earlier quoted context omitted.
Rates went up because of the release of the inflation data. It wasn’t anything to do with what you are mentioning. Also, while the dynamic you describe is real (1) the mechanics are not similar to an equity short squeeze , not a good analogy and (2) unlikely this type of pressure comes from China. They need to hold/buy treasuries to manage their currency (ie keep it weak). If they don’t, their export competitiveness…
the fed are clowns. inflation data should have been priced in as anybody worth their salt (or indeed anybody doing any kind of shopping, which is everyone) knew that inflation would print above expectations, especially fed's. today's reaction was... panic of uninformed volume?
So, we'll see.