June 30, 2022

Model Update: Common-Idiosyncratic and Covid (CI-C) Model (PCE)

Results

Figure 1 shows the decomposition of the MoM of PCE excluding food and energy items in the “common” component (the blue bars), the “idiosyncratic” component (the yellow bars), and the “Covid” effect (the green bars). Our model estimates that in May the common component expanded 20bps (in line with the average of the previous 7-8 months), and that the Covid effect is positive (8bps) although smaller than in previous months. Given today’s reading, the YoY of the common component is estimated at 2.4 percent in May, unchanged to rounding compared to the last 4 months (Figure 2 and 3). Finally, the 3m/3m a.r. and the 6m/6m of the common component (Figure 4) are estimated at 2.3% and 2.4%, respectively in May.

Comment

The evidence from the monthly distributions matches well the one from our CI-C model.

The data in the last few months show that the common component has been growing at an average pace of about 2½. This evidence is in line with our trend models which currently estimates the level of the trend at 2.6 percent.

Importantly, the fact that the common component has gone sideways for few months should not be taken as a victory lap for the Fed (at least, not yet). Rather, the model is indicating that net of Covid and idiosyncratic effects, the common/trend component remains strong. In other words, the model is suggesting that even net of Covid-related factors, the underlying pace of the data would not be consistent with the Fed target.

Overall, the evidence of the CI-C model is in line with the monthly distributions: the situation remains serious for the Fed but at least it is not getting worse anymore.

Figures

Figure 1  Contributions to MoM changes of PCE excluding food and energy items

Note: the Figure shows the decomposition of the MoM percent changes of PCE prices excluding food and energy items. The contributions are estimated using our CI-C model, a 2-stage OLS-LASSO regression model. The “Covid” effect is identified with price variations outside the 10th-90th percentiles of each item pre-Covid price change distribution.

Figure 2  Contributions to YoY changes of PCE excluding food and energy items

Note: the Figure shows the decomposition of the YoY percent changes of PCE prices excluding food and energy items. The contributions are estimated using our CI-C model, a 2-stage OLS-LASSO regression model. The “Covid” effect is identified with price variations outside the 10th-90th percentiles of each item pre-Covid price change distribution.

Figure 3          YoY of PCE prices excluding food and energy items and the “Common” component of the CI-C model

Note: the Figure shows the YoY of PCE excluding food and energy items (black line), and the YoY of the “common component” (blue line) estimated using our CI-C model.

Figure 4  Estimated “Common” component: YoY, 3m/3m a.r. and 6m/6m a.r.

Note: the Figure shows the 3m/3m at annual rate (green line), the 6m/6m at annual rate (red line), and the YoY (blue line) of the “common component” estimated using our CI-C model.

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