The standardised super-peak hedge product

electricity consulting
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Private: Ruyi Jia, Dr Eilya Torshizian

Bringing Transparency and Liquidity to Aotearoa’s Electricity Hedge Market

Principal Economics is delighted to release our new report for the Electricity Authority, evaluating market-making parameters for a standardised super‑peak hedge contract. This analysis supports regulatory design that promotes price transparency, market liquidity, and robust consumer outcomes.

Key Findings

  • Tiered Spread Cap Recommendation: We suggest a responsive cap structure with a 3.5% spread during normal conditions, and up to 8% during high-volatility or stress periods, ensuring a balance between affordability for hedge-takers and sustainable participation by market makers.
  • Optimal Quote Depth Identified: Market-maker net benefits peak between 10–15 MW of quote depth. Beyond this range, marginal benefits decline, reflecting diminishing returns.
  • Evidence-Based Elasticity Insights: Regression results show that in high-volatility environments, a 1% increase in volatility increases spreads by ~0.37%, while doubling depth lowers spreads by ~8%, highlighting the trade-off between risk and liquidity.
  • Real-World Spread Benchmarking: Analysis of super‑peak auction data reveals median effective spreads around 3%, with the 95th percentile reaching 9–10%, supporting the recommended cap framework.
  • Policy Framework Based on an Optimal Frontier: We apply an optimal frontier approach, plotting trade-offs between spread and depth to identify efficient market-making combinations. These choices deliver targeted liquidity at minimal cost—supporting the Electricity Authority’s public-interest objectives.

Why This Matters

The findings inform regulatory calibration of market-making in New Zealand’s super-peak hedge markets—helping ensure resilience amid volatility and price shocks, while avoiding onerous caps that stifle market participation. Our evidence-based design framework is meant to support durable, fair, and cost-conscious policy choices.


Read the full report for a comprehensive breakdown of our methodology, data, simulations, and policy implications: Download the report PDF here.