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​For more information on this stakeholder initiative, email Stakeholder Engagement.

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Introduction to Ontario's Physical Markets

Energy Market Pricing System Review (SE-114)

​The IESO has launched a review of Ontario's wholesale energy market pricing system, sometimes referred to as the "two-schedule price setting system", which is used to settle and dispatch resources in the IESO- administered market. This review is part of a series of consultations launched by the IESO to consider the efficiency and effectiveness of various aspects of the electricity market, and will focus on the energy market pricing system. As part of this review, potential design alternatives will be compared against the status quo with an overall objective of providing "an efficient dispatch and pricing process that produces transparent prices."

The review is intended to evaluate the real-time pricing process and consider possible options for change in order to:

  • Maximise the efficiency of outcomes in real-time and over the long-term   

  • Allow for equal opportunity for participation by different types of and technologies resources (both existing resources and new)

  • Employ market-based mechanisms which result in transparent prices reflective of the actual costs of generation and the limits of the transmission system

The results from the Energy Market Pricing System Review (SE-114) will provide input into a broader IESO consultation that will prioritize potential enhancements to improve the efficiency and effectiveness of Ontario's electricity market.

​This stakeholder engagement has been launched to provide stakeholders with an opportunity provide input into the approach of this review.

​​G​​iven the centrality of the energy market pricing system to the operations of the market and the potential impact of design changes, this review is likely to be of interest to all IESO market participants and stakeholders All stakeholders, or their representatives, with an interest in this topic are encouraged to participate in the process.

Letter to Stakeholders
Stakeholder Engagement Plan (Draft)
Stakeholder Engagement Plan (Final)

Schedule of Activities

Date Agenda/Minutes


Expected Actions

​May 4, 2015Next Steps

March 24, 2015
Minutes (Draft)

Stakeholder Session #3

Review and discussion of report findings

February 19, 2015

Posting Report

December 20, 2013

IESO Response to Stakeholder Feedback

Comments and Responses Document Posted to Web

​November 18, 2013

November 8, 2013

​Deadline for stakeholder feedback on Modeling Methodology

Stakeholder Feedback

Stakeholders to provide written feedback on proposed methodology

October 25, 2013

Stakeholder Session #2

Presentation of Modeling Plan and changes (if applicable) from Discussion Paper

October 21, 2013

IESO response to stakeholder feedback

October 3, 2013

​Deadline for stakeholder feedback on Discussion Paper and Stakeholder Engagement Plan

Stakeholder Feedback

Stakeholders to provide written feedback

September 19, 2013

Stakeholder Session #1

Presentation of paper, discussion of overall approach and work plan

August 29, 2013

Post and communicate Stakeholder Plan and Discussion Paper

Stakeholders to provide written feedback. Paper will layout objective of review and scope of discussion