The phrase "aggregate basis" refers to considering or combining multiple things together as a whole. It means looking at the total or overall result of a group of individual components or data points. Full definition
Full - time equivalent staff comprise multiple part - time staff aggregated based on typical usage throughout a year to represent a single full - time employee. (tiga.org)
While this only goes back to 1999, it would still be insightful to compare these two indexes on a year by year and aggregate basis for total return and volatility to get a true sense of the difference that treasury bond duration makes. (awealthofcommonsense.com)
The ratio is calculated on a weighted, aggregate basis according to this formula: Air - Conditioning Intensity = Btu for Air Conditioning / (Cooled SquareFeet * Cooling Degree - Days) (eia.gov)