For the third month in a row, and the fourth time in the past five months, the Deloitte WA Index has finished above the one hundred billion dollar mark.
In the month of August, the market capitalisation of WA-listed companies jumped by $2.2 billion to $105 billion, according to the Deloitte WA Index.
Deloitte Perth office managing partner Keith Jones said nickel was a strong driver of the market in August.
"Nickel rose significantly in August increasing by 18 per cent," he said.
"A number of nickel companies enjoyed significant growth with Minara Resources increasing its market capitalisation by 40 per cent to $479 million and Lionore up 22 per cent to $326 million."
"While the market remains volatile, the consistent increase in the market capitalisation of WA companies over $100 billion, revealed by the Deloitte WA Index, shows the WA market value is being maintained."
The biggest movers in August were Victorian Alliance Resources increasing by 230 per cent ($149 million) and NSW-based Energy World Corporation Ltd by 227 per cent ($151 million).
In the commodities sector notable gains were made by silver, lead and nickel all increasing more than 10 per cent (average 14 per cent). Meanwhile, losses made on commodity prices were oil, aluminium, copper and gold (average 3 per cent).
The Deloitte WA Index increased in August by 2.11per cent in comparison to the All Ordinaries - 2.48 per cent, US S&P 500 -2.01 per cent, FTSE 100 -0.38 per cent and Nikkei -4.42 per cent.
All Indices have increased over the last 12 months with Deloitte WA Index leading the way with an increase of 33 per cent. In comparison, increases over the last 12 months for all other indices were All Ordinaries 15 per cent, US S&P 500 8 per cent, FTSE 100 12 per cent and Nikkei 30 per cent.