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Investigation into Synergy’s pricing behaviour

The ERA monitors the effectiveness of the Wholesale Electricity Market (WEM) in meeting the wholesale market objectives. This includes monitoring prices offered by market generators and investigating whether participants’ behaviour is related to market power.

On 26 July 2017, the ERA notified the Electricity Generation and Retail Corporation trading as Synergy that it had commenced an investigation into price-quantity offers submitted by Synergy in the Balancing Market. 

Pursuant to clause 2.16.9B(aA) of the WEM Rules, for the trading period since 31 March 2016 the ERA is investigating whether:

  • Synergy’s price-quantity offers may have exceeded its reasonable expectation of the short run marginal cost of generating the electricity; and
  • the behaviour relates to market power

In its notification to Synergy on 26 July 2017, the ERA requested an explanation from Synergy for its pricing behaviour. This is a requirement of clause 2.16.9B of the WEM Rules.

Synergy’s explanation is available below. 

The ERA is continuing its investigation and must publish the results by 26 January 2018. The WEM Rules allow this timeframe to be extended.


Date Documents File type
28-Jul-17 Letter from Synergy Adobe PDF 2.06 MB
31-Jul-17 Notice of ERA investigation commencement Adobe PDF 159 kB