VIC1 experienced brief negative pricing at $-0.10/MWh and $-0.05/MWh across two consecutive intervals (02:20–02:25 on 8 June 2026), representing a minor market event. Prices recovered quickly to $1.00/MWh in the following interval, with the negative pricing occurring during a period of high renewable generation (867.93 MW wind and 884.50 MW solar) and substantial brown coal output (3378.78 MW).
The negative pricing was driven by an oversupply condition where combined renewable and coal generation exceeded demand during the low-demand early morning period. The binding constraint F_T+RREG_0050, with a marginal value of $3.82/MWh across the affected intervals, indicates that congestion or system strength requirements were limiting the ability to reduce generation or export excess supply, forcing marginal generators to accept negative prices to remain dispatchable and meet system obligations.
Causal analysis generated by gridIQ's synthesis model from live AEMO market data: dispatch prices, generation mix, interconnector flows and market notices in the interval surrounding the event.