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  • Data release and accessibility
    With the start up of the California ISO's new market system based on Locational Marginal Pricing (LMP) on April 1, 2009, stakeholders have expressed a desire for the release of additional information that would enable them to better understand market results and participate more effectively in the ISO markets.
    In response, the ISO committed to conducting a stakeholder process to explore the issue of data release and accessibility in ISO markets and to implement appropriate enhancements to its current data provision practices: Phase 1 - Transmission Constraints; Phase 2 - Convergence Bidding Information Release; Phase 3 - Other types of market data to support well-functioning, competitive ISO spot markets, including Price Discovery and Outage Information.
    • Outcome
      Phase 1 – Transmission Constraints: Implemented on July 13, 2010. Reports and data on transmission constraints are released to market participants through California ISO systems.
      Phase 2 – Convergence Bidding Information Release: The release of a daily market summary report and the hourly net cleared virtual quantities by node at the close of the real-time market will promote market efficiency in the ISO energy markets once convergence bidding is implemented in February 2011. Because the nodal information will be sufficiently aggregated, publishing the net cleared quantities by node is permissible under Section 20.2 of the ISO tariff. Accordingly, implementation of this data release approach will not require a subsequent FERC filing.