What is Trimmed Mean PCE?
Fred, the St. Louis Fed website offers this Explanation of Trimmed Mean PCE.
The Trimmed Mean PCE inflation rate produced by the Federal Reserve Bank of Dallas is an alternative measure of core inflation in the price index for personal consumption expenditures (PCE). The data series is calculated by the Dallas Fed, using data from the Bureau of Economic Analysis (BEA). Calculating the trimmed mean PCE inflation rate for a given month involves looking at the price changes for each of the individual components of personal consumption expenditures. The individual price changes are sorted in ascending order from “fell the most” to “rose the most,” and a certain fraction of the most extreme observations at both ends of the spectrum are thrown out or trimmed. The inflation rate is then calculated as a weighted average of the remaining components. The trimmed mean inflation rate is a proxy for true core PCE inflation rate. The resulting inflation measure has been shown to outperform the more conventional “excluding food and energy” measure as a gauge of core inflation.
A Dallas Fed Working Paper offers this assessment.
Trimmed-mean inflation is the superior communications and policy tool because it is a less-biased real-time estimator of headline inflation and because it more successfully filters out headline inflation’s transitory variation, leaving only cyclical and trend components.
Measure Comparison
- Essentially the Dallas Fed says lets throw out the top and bottom items of the PCE and average the rest.
- The PCE stands for Personal Consumption indicators and is the Fed’s preferred measure of inflation.
- PCE differs from the CPI in that it counts expenses paid on behalf of consumers such as medical insurance.
- The Consumer Price Index weights rent much higher than the PCE which in turn weights medical higher.
Even with that explanation it’s not quite clear how the Dallas Fed fabricates a preposterous 2.8% year-over-year measure of inflation.
A chart download shows the magic of throwing out “a certain fraction” from both ends to “outperform” conventional measures.
Items Chopped Off the Bottom
I am a bit amused that the price of food supplied to to the military and school lunches went down by 49.2% annualized in one month but hey, OK.
Items Chopped Off the Top
Inquiring minds who want to see the entire chopping block and what’s included can download the data at from the Dallas Fed.
Look for the link that says “components included and excluded“.
Chopping Methodology
- The Dallas Fed chopped off items with a combined weight of 24.07% from the low end.
- This was “balanced” by chopping off items with a weight of 32.50% (100-67.5) at the top end.
- Everything that went up by more than 9% annualized was chopped off the top culminating with gasoline up 103.5% and air transportation up 112.7%.
Ultimately, the Dallas Fed discarded 56.57% of the entire PCE, heavily weighted by discarding high inflation items to arrive at a preposterous 2.8% year-over-year measure of inflation.
Looking back, it’s easy to see why they would come up with this.
Outperformance Then and Now
- When the CPI peaked at 14.8% in 1980, this brilliantly constructed “designed to outperform” measure peaked at 8.6%.
- Today the CPI is 6.8%, trimmed mean PCE at 2.8%, and PCE at 5.7%.
If that’s not “outperformance” what is?
Hopefully nobody takes this seriously, but the Dallas Fed pushes this as an alternative measure every month.
Every Measure of Real Interest Rates Shows the Fed is Out of Control
Bad things happen when the Fed ignores asset bubbles. And the way to ignore asset bubbles is to pretend housing, land prices, speculation in Bitcoin, and insane stock market valuations are not inflation.
It’s difficult to state the inflation effect on stocks or Bitcoin but housing is one most human beings easily see even though the Fed and Martian economists can’t.
On December 29, I commented Every Measure of Real Interest Rates Shows the Fed is Out of Control
My housing-adjusted CPI measure stands at 9.31%. See link for details.
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The change sparked investor fear that they won’t get their money back.
“I think it’s hopeless, and I’m scared, but if we don’t fight for our rights, that’s worse,” said a retired woman surnamed Du who was among those outside Evergrande’s offices in the southern Chinese metropolis and said she had invested one million yuan in Evergrande wealth management products.
Inflation occurs when there is a chronic
across-the-board increase in prices. or, looking at the other side of the coin,
depreciation of money. Inflation is not a temporary increase in the price
level, nor a long-term increase in any particular prices.
The evidence of inflation cannot be conclusively
deduced from the monthly changes in the price indices. From the standpoint of
the economy no overall index, or average of all prices, exists.
Therefore, no single figure exists which
represents the value of money. Prices reflect, in only a marginal amount, the
inflation that took place in asset prices – real estate, gold, stocks, etc.
Soaring real estate prices of course, have been “validated” by these
enormous flows.
Rampant speculation and a deluge of
irresponsible borrowing and lending have, as a consequence, characterized hard
and paper asset prices. The government inspired price indices are passive
indicators; of the average change; of a group of prices. They do not reveal why
prices rise or fall.
As Friedman said;
“Inflation is always and everywhere a monetary phenomenon” — ”
in the sense that it cannot occur without a more rapid increase in the quantity
of money than in OUTPUT”
Only price
increases generated by demand, irrespective of changes in supply, provide
evidence of inflation. There must be an increase in aggregate monetary
purchasing power, AD, which can come about only as a consequence of an increase
in the volume and/or transactions’ velocity of money.
The volume of
money flows must expand sufficiently to push prices, up, irrespective of the
volume of financial transactions consummated, the exchange value of the U.S. $
(reflected in FX indexes and currency pairs), and the flow of goods and
services into the market economy.
OT, here in Austin commerce is taking a real hit from Omicron. It isn’t about a lot of sick people, but it is about a lot of people calling in COVID positive, not coming to work, being short-staffed and lots of people quitting their jobs, I believe. My office is at a crawl and so is every restaurant and store I walk into this week. Hopefully it’s temporary.Remember during the 2020 lockdown when people said businesses would shutter even if they didn’t make it mandatory? That’s what this is, and I just hope it ends soon.
top culminating with gasoline up 103.5% and air transportation up
112.7%.”
That’s kinda like what they do with the judges’ scores at gymnastics competitions.
It’s fitting, considering that the Fed has to go through all these gymnastics to arrive at an inflation number that they like!