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Market Notice
January 14, 2019


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Market Rules and Design


Western Energy Imbalance Market

Temporary Use of Gas Price Index for Day-Ahead Market White Paper Posted: Call 1/28/19


The California ISO has published a white paper on the temporary use of updated Monday-only gas price index in the day-ahead market for Mondays only and when available. A stakeholder call has been scheduled on Jan. 28, 2019 to discuss details of the white paper. The paper is available on the miscellaneous stakeholder meetings webpage at


The white paper explains a proposed tariff amendment that will authorize the ISO to use the Monday-only gas index published by the Intercontinental Exchange on Friday, which will reflect the most current gas price index for the day-ahead market. The Local Market Power Mitigation Enhancements initiative, currently in the policy development phase of the stakeholder process, proposes to enforce permanently the use of the Monday-only gas index in the day-ahead market, which will be filed separately with the Federal Energy Regulatory Commission (FERC).


An agenda and presentation will be posted prior to the call on the webpage linked above.


Please submit written comments on the white paper to by close of business January 22.


Meeting Details

Date: Monday, Jan. 28, 2019

Time: 1 p.m. - 3 p.m. PST

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Participation Information

Step 1: call 1-877-369-5230, access code: 0960961##

Step 2: join web conference

Technical support: call the AT&T Help Desk at 1-888-796-6118


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