Consumer prices excluding food and energy, as a percentage change over twelve months. The Federal Reserve targets PCE inflation; CPI is published earlier and is the more widely reported gauge.
Threshold source: worldstat.us construction: the Federal Reserve targets 2 % on PCE inflation, and core CPI runs above core PCE; 3.5 % is well clear of both. How thresholds are chosen
Shelter is about a third of the headline index and over 40 % of core, and lags market rents by a year, so core CPI overstates inflation late in a disinflation and understates it early in one.