Gas Supply Hub Herfindahl-Hirschman index (HHI) – Wallumbilla


QuarterSELL HHI (Herfindahl-Hirschman index (HHI))BUY HHI (Herfindahl-Hirschman index (HHI))
2014 Q272494399
2014 Q346413433
2014 Q442082506
2015 Q119293009
2015 Q217992150
2015 Q370862149
2015 Q422852932
2016 Q124812705
2016 Q238493294
2016 Q320432362
2016 Q414722126
2017 Q120572391
2017 Q229532176
2017 Q321781410
2017 Q414281393
2018 Q123882176
2018 Q212731564
2018 Q325402027
2018 Q415641610
2019 Q118341631
2019 Q218341499
2019 Q323221603
2019 Q412961302
2020 Q117411023
2020 Q217051658
2020 Q315221097
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Gas liquidity (GSH)
AER reference: 

Wallumbilla in Queensland is a major gas supply hub. As a pipeline interconnection point for the Surat-Bowen Basin, it links gas markets in Queensland, South Australia, New South Wales and Victoria. It services industrial gas customers, LNG export facilities and gas powered generators, making it a natural point of trade and an ideal location for a gas trading exchange.

The Herfindahl-Hirschman index (HHI) is a measure of market concentration. It is calculated by squaring the market share of each participant competing in the market and then summing the resulting numbers. It can range from zero to 10,000.

A higher measure of market concentration indicates a lower level of competition. For example, one participant trading on either the buy or sell side of a trade would have a monopoly in the market and the 100 per cent market share would produce a Herfindahl-Hirschman Index (HHI) equal to 10,000. The more traders participating in the market, the closer the HHI would be to zero, indicating a higher level of competition.