A great deal of analysis has been done on this subject. Recently, San Francisco Fed economists conducted a study on various spreads in the treasury market. Using monthly data from January 1972 through July 2018, they looked at each spread and predicted whether the economy would be in recession 12 months in the future. The study found that the ten year-three month (10y- 3m) spread was the “most reliable predictor” in signaling a recession. One of their conclusions, however, was that while the risk of recession might be rising, the flattening of the 10y-3m yield spread does not currently signal an impending recession. They also correctly pointed out no causality. The spread at the time of the article was +100 basis points (bps), or 1%. As recently as late August, the spread was down to the low 70s, but, quite volatile, it has recently reversed higher.