The Deloitte Stock Exchange Index for each participating state is locally produced and tracks the performance of publicly listed companies headquartered in that state.

Each state's index, produced on either a monthly or quarterly basis is compiled from publicly available information provided by the ASX. 

Broadly, a company's inclusion in a state index will be dependent on the location of its registered office or where a substantial portion of the company's operations is focussed, regardless of whether the company is dually listed.

The information on listed companies is extracted and summed to provide a cumulative market capitalisation figure for all companies in the state.  If a company has been suspended or delisted during a particular period no data will be included for that month and all subsequent months until the company is re-listed or the suspension lifted. Historical information regarding the company’s market capitalisation will continue to be included in the calculation of the index.