that is a rumour and it is not at all plausible.There is a plausible rumour that the sudden drop in US Bond prices was caused by Canada, France, Japan, GB etc selling off enough US Bonds to rattle the market ..and Trump. And guess who is reported to have orchestrated it? Carney has exactly the economic chops, both practical and speaking from a position of wisdom and respect to outmanouever Trump's crude tarriff boondoggle.
it is a false liberal narrative
The U.S. Treasury market is a bedrock of the global financial system. it is the largest and most liquid bond market in the world Today, there are $28 trillion of Treasury securities outstanding. An average of over $910 billion are traded every day.
other countries do hold a significant proportion of the outstanding U.S. Treasuries, however these will be held predominately by foreign institutional investor , not governments (save China)
any sell off occurred because of moves by institutional money managers and possibly China, and China does not ask Mark carney what to do , neither do institutional money managers
Most sovereign governments do not have the mandate to play political games with the bond market
Many have tried to support their currency in time on economic distress , most are unsuccessful but ultimately it is the economic conditions & supply / demand that determines asset prices.
Mark Carney does not push around the US treasury market
Think about it over $910 billion are traded every day.