Earlier quoted context omitted.
Yes. 1965. And then it bounced back and forth for the next 4-5 years before we finally had a recession in 1970. https://fred.stlouisfed.org/graph/?g=nn5r
> https://fred.stlouisfed.org/graph/?g=nn5r Note: this graph is for 10Y1Y, while the indicator generally talked about is 10Y3M.
I used this one because it had the longest history.