A major reason why the new Fed chair is refusing to provide forward guidance, in a major departure from all(?) previous Fed chairs and will likely require textbooks to be rewritten.
https://en.wikipedia.org/wiki/Fedspeak
Quote from Greenspan himself:
> As Fed chairman, every time I expressed a view, I added or subtracted 10 basis points from the credit market. That was not helpful. But I nonetheless had to testify before Congress. On questions that were too market-sensitive to answer, 'no comment' was indeed an answer. And so you construct what we used to call Fed-speak. I would hypothetically think of a little plate in front of my eyes, which was the Washington Post, the following morning's headline, and I would catch myself in the middle of a sentence. Then, instead of just stopping, I would continue on resolving the sentence in some obscure way which made it incomprehensible. But nobody was quite sure I wasn't saying something profound when I wasn't. And that became the so-called Fed-speak which I became an expert on over the years. It's a self-protection mechanism ... when you're in an environment where people are shooting questions at you, and you've got to be very careful about the nuances of what you're going to say and what you don't say.
https://www.richmondfed.org/publications/research/econ_focus...
"Notably, in 1974, Federal Reserve chair Arthur Burns felt it necessary to make clear that high nominal interest rates would need to continue “for a time” as an anti-inflation measure;"
"A later chair, Paul Volcker, having presided over a period of very restrictive monetary policy, chose in March 1982 to make an explicit indication that nominal interest rates would and should fall in the period ahead."
https://www.federalreserve.gov/econres/feds/files/2021033pap...