VIC1 experienced sustained negative pricing at −$0.10/MWh across two intervals (17:15 and 17:25 on 8 June 2026), occurring within a period of generally depressed prices ranging from $0.01 to $5.08/MWh. The negative pricing events were separated by a brief price spike to $0.01/MWh, suggesting transient oversupply conditions rather than persistent structural imbalance.
The negative pricing coincided with high wind generation (approximately 6,000 MW combined across the generation mix) and brown coal generation (3,305 MW), indicating an oversupply situation typical of high renewable output periods. A binding constraint (F_T+RREG_0050) with marginal values of $3.81–$3.82/MWh was active during this period, suggesting that constraint-driven dispatch requirements created pressure to accept negative prices to manage generation and maintain system security.
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.