"Why Food and Energy Prices Are Excluded - Food and energy prices are exempt from this calculation because their prices can be too volatile or fluctuate wildly. Food and energy are necessary staples, meaning demand for them doesn't change much even as prices rise"

https://www.investopedia.com/terms/c/coreinflation.asp

yes. gas is included in the transportation group

Is it? I thought both it and food were excluded from the core index because their prices were too "volatile"