This effect is perhaps clearest in the government bond market, with yields near historic lows. But it is also evident in the credit markets, with credit spreads paid by banks having fallen recently.
See Jeanna Smialek, "Williams Says Fed's Era of Market Hand-Holding Is Nearing an End," Bloomberg, May 17, 2018, https://www.bloomberg.com/news/articles/2018-05-16/williams-says-fed-s-era-of-market-hand -holding-nearing-an-end?in_source=video_page.