by Calculated Risk on 10/12/2005 06:21:00 PM

Economist Dr. Arturo Estrella of the NY FED provides some answers to Frequently Asked Questions about the yield curve in "The Yield Curve as a Leading Indicator"

Q. What does the evidence say, in short?

A. The difference between long-term and short-term interest rates ("the slope of the yield curve" or "the term spread") has borne a consistent negative relationship with subsequent real economic activity in the United States, with a lead time of about four to six quarters. The measures of the yield curve most frequently employed are based on differences between interest rates on Treasury securities of contrasting maturities, for instance, ten years minus three months. The measures of real activity for which predictive power has been found include GNP and GDP growth, growth in consumption, investment and industrial production, and economic recessions as dated by the National Bureau of Economic Research (NBER). The specific accuracy of these predictions depends on the particular measures employed, as well as on the estimation and prediction periods. However, the results are generally statistically significant and compare favorably with other variables employed as leading indicators. For instance, models that predict real GDP growth or recessions tend to explain 30 percent or more of the variation in the measure of real activity. See Estrella and Hardouvelis (1991). The yield curve has predicted essentially every U.S. recession since 1950 with only one "false" signal, which preceded the credit crunch and slowdown in production in 1967. There is also evidence that the predictive relationships exist in other countries, notably Germany, Canada, and the United Kingdom. See Estrella and Mishkin (1997) and Bernard and Gerlach (1998).

See the link for more FAQs. Dr. Estrella provides this graph to compare the yield curve to previous recessions.

Click on graph for larger image.

Yield curve inversions have preceded each of the last six recessions. To illustrate, the top figure shows the spread between ten‐year and three‐month Treasury securities since 1960, with shading to indicate NBER dated recessions. The bottom panel shows the probability of recession one year ahead, obtained by applying a probit model to the term spread as defined above.

The yield curve is still positive, but the spread has been decreasing. Therefore, according to Dr. Estrella, the probability of a recession is increasing.