The monthly Deloitte Western Australia Stock Exchange Index is compiled from publicly available information provided by the ASX and Capital IQ on the market capitalisation of each Western Australian listed company.

A company is included as a Western Australian Company where its ASX Home Exchange is in Western Australia, regardless of whether the company is dually listed.

The base period of the Deloitte WA Index is May 2000 and for the purposes of the index this month is given a notional value of one.

Please note, 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.

The latest edition - WA Index - May 2025

The WA Index grew 5% in May, on the back of strong commodity prices. Heightened market volatility persisted into the month of May, although this did little to deter investors, with the US S&P 500 recording its strongest monthly performance since November 2023, rising 6.2% during the period. This optimism extended across the global economy, with several major indices recording gains for the period. The FTSE 100 rose 3.3% whilst Japan’s Nikkei advanced 5.3%.

Most commodities also followed equity markets, with Platinum surging as many economists are speculating that the precious metal will follow in the footsteps of gold and silver. Uranium prices also climbed in response to favourable political announcements and copper prices partially rebounded after a decline in April. Conversely, just when it seemed lithium prices couldn’t drop any further, prices fell another 16%, as oversupply continued to exert downward pressure on prices. 

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