May CPI

By Paul Gomme and Peter Rupert

The CPI was unchanged in May according to the BLS release. By any one of the measures, year over year, 3.25%, monthly annualized, 0.69% or our trend measure, 2.70%, CPI inflation is down. The core CPI (ex food and energy) shows a similar pattern.

Food away from home, used cars and trucks and shelter were items with the largest monthly price increases, 0.4%, 0.6% and 0.4%, respectively. The largest declines came from energy commodities, declining 3.6% and a 3.5% decline for the gasoline component.

What to Expect for PCE inflation

As we have discussed in earlier posts, year-over-year inflation measures evolve sluggishly. The reason for this sluggishness is that the year-over-year inflation rate is the 12-month average of month-over-month inflation rates. So, the change in the year-over-year CPI inflation rate equals the month-over-month inflation rate for the current month (the inflation rate being added to the calculation) less the month-over-month inflation rate from 13 months ago (the inflation rate being dropped from the calculation) — all divided by 12. As a result, even if the month-over-month inflation rates started coming in at, say, 2%, it would take nearly 12 months until the year-over-year inflation rate would reflect this new 2% trend.

Instead, consider our trend inflation measure which places a 1/3 weight on the current month-over-month inflation rate, and a 2/3 weight on last month’s trend inflation. Our trend measure of inflation will, necessarily, respond in a more timely fashion to month-over-month inflation rates. Our trend measure of CPI inflation fell by 0.66 percentage points; core inflation by 1.3 percentage points. Similar declines in PCE inflation would result in PCE inflation around 2%, and core PCE inflation around 2.67%. Alternatively, over long periods of time, CPI inflation runs approximately 0.5 percentage points higher than PCE inflation. Subtracting 0.5 percentage points from the May CPI inflation rates suggests PCE inflation of 2.2% for May, and core PCE inflation of 2.8%.

In other words, we expect good news on the PCE inflation front when the data for May is released in a couple of weeks’ time. That said, FOMC members have indicated that they will hold off on rate cuts until they have seen a few months of such positive developments, meaning inflation as measured by the core PCE deflator trending towards 2%. It remains to be seen whether FOMC members will feel pressure to cut rates given that the European Central Bank and the Bank of Canada have already cut their rates.

The FOMC statement came out on the same day as the CPI report and reiterated their earlier view

The Committee does not expect it will be appropriate to reduce the target range until it has gained greater confidence that inflation is moving sustainably toward 2 percent.

FOMC, June 12

And so they left the target rate unchanged at 5.25-5.5%. The general statement from the FOMC is that the real economy is still humming along, inflation is not yet revealing the hoped for sustainable decline.

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