It centers on the inverted yield curve - long term treasury bond rates being lower than the short term rates. That is considered to be a classic sign of a looming recession in a free market capitalist economy.
There are a number of arguments against the rule holding true in the current economic situation, and there are arguments in favor of the usual. The point I would offer for your consideration is that the predicted timing for the beginning of this recession is the summer of 2020!
Now let's see... what will be the hot news item in the Autumn of 2020? Why looky here: it will be the final stretch of the presidential campaign! Well shet mah mouf!
“the predicted timing for the beginning of this recession is the summer of 2020!”
Only by those predicting that timing. Opinions are all over the lot amongst experts.