I am very annoyed that this use of 'freak' and further corruption of the term 'black swan event' have just gotten completely common place.
A black swan event is supoosed to be something completely impossible to have been predicted before hand because you didn't have enough knowledge to even understand there was a kind of risk you were not accounting for.
An 'unknown unknown', to use the only useful idea Donald Rumsfeld ever came up with.
... This bond sell off is utterly predictable, unless you are completely brainwashed into a delusional level of normalcy bias and complacency.
All you have to do is realize the US is acting like an unstable dictatorship... which it very obviously is... and this is an easily predictable outcome for anyone with a decent knowledge of macroecon theory/history.
If ya'll want another layer of irony to all this:
George Soros initially rose to general public fame/infamy with large bets against British Pound in 1992, that effectively defeated the Bank of England's attempts to stabilize the currency, resulting in its devaluation, and something like a billion $ profit for Soros.
Fast forward to now, and Trump supporters have spent the last 5 or 10 years acting like Soros is secretly the most underhanded and influential 'world controller' bogey man that exists, and they blame everything they don't like on being funded by him... despite pretty much all of his charities and funds and causes he donates to being publically available knowledge... and despite Soros being a fairly small fish in the modern ocean of much, much more wealthy and infuential corporations and individuals.
... So, now, Trump very well may have done basically the same thing as what Soros did 3 decades ago: force the devaluation of the USD and cause economic mayhem, but... at a much, much larger scale than Soros did.
The Trump supporters have utterly and entirely lost their own plot, that they themselves mostly fabricated.