Sweden’s inflation rate has developed into a very interesting oddity as headline inflation as measured by the harmonized index of consumer prices (HICP), that is used in Europe, has come to diverge sharply from the Swedish national rate of inflation measured by its national CPI. The HICP inflation rate is 2.2% over the last 12 months; Sweden’s national rate is up by only 0.2%. If we rank each of these two inflation rates on data back to 2001, the rank of the HICP is in its 72.2 percentile while the rank of the national CPI is in only its 19.4 percentile, the lower one-fifth of its historic range of national inflation rates. These two rankings occur over the same periods and so there's nothing about the periodicity that's responsible for this; there's simply very different performance over the recent span.
About measuring inflation The HICP was adopted in Europe once the monetary union was formed and the countries of Europe were not able to get together to decide how to treat housing costs, which are important element in the CPI. They had entered into CPIs in different countries in different ways at that point. In the United States, inflation statistics are often criticized because of the way the housing component fits into them. Housing has such a large weight in the U.S. inflation measure. U.S. housing costs consider the cost of running the house in terms of taxes and utility costs; they look at the rental equivalent values, and they also have an owner imputed rent for people who live in their own homes. Of course, owner equivalent rent is a made-up number; it's completely imputed. Because a lot of European mortgages are short-term and they reprice when the central bank changes its rate, it’s very important to be careful how interest rates are treated in the housing cost indexes in Europe. The central bank did not want to be in a position where it would be raising interest rates to fight inflation and causing inflation to be higher because they were raising the mortgage interest rates on homes and causing the cost of housing to go up. For this reason, the HICP measures do not include housing costs. As we can see in the Swedish details for this month, housing and fuel costs are down 3.1% year-over-year. If we look at the ranking of housing costs for year-over-year growth, we see that they rank in the lower 6.4 percentile and are one of the most important factors in driving the national CPI lower and, of course, that metric is absent from the HICP.
Inflation is always rife with controversy: All of this is simply just another way to point out that inflation, while we measure it and talk about it, it's a controversial subject. How we measure it does matter. However, for monetary policy purposes, if we construct a measure that is reasonable and if we follow it consistently over the years, it should give us good signals and a good way to measure inflation and engage monetary policy. Yet, very clearly, if there are two competing gauges, it could become a real problem to jump from one to the other because they track different circumstances.
The current state of Swedish inflation: Swedish inflation in November fell by 0.3% month-to-month after rising by 0.5% in October and falling by 0.1% in September. The diffusion, or breadth, of inflation acceleration was only 33.3% in November. It jumped up to 55.6% in October, but it had been lower in September at 33%. Looking at Swedish inflation over 12-month, 6-month, and 3-month periods, the HICP goes from 2.2% over 12 months to an annualized pace of 5.7% over 6 months and then back down to 0.5% over 3 months. The national CPI has the same sort of topography but different growth rates with the CPI up by only 0.2% over 12 months, accelerating to 1.5% over 6 months and then declining at a -0.9% annual rate over 3 months. Inflation diffusion over 3 months in the national index is only 11.1%, over 6 months it jumps up to 66.7%, and over 12 months it's at 44.4% which is below 50% marking inflation as having more deceleration than acceleration.
Controlled inflation: On balance, Swedish inflation appears to be under control using either method. The ranking for inflation by category shows high inflation for food & nonalcoholic beverages, education, other goods & services, and medical care. However, inflation is below its median pace and bears low rankings for clothing & footwear, housing, fuel & lighting, recreation & culture, and transportation. Inflation is always somewhat mixed across sectors. That’s another thing that makes it hard to pin down exactly what inflation is, because people who consume different baskets of goods are going to experience different inflation rates. However, Sweden appears to have its inflation situation under control whichever metric you look at. The chart makes it clear that after its spike during COVID, inflation has come back down to a reasonable long-term pace that appears to be close to something that the central bank would find acceptable. The recent rise in HICP inflation seems to be unwinding and year-over-pace is down to a moderate 2.2%.
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