Notice to market participants and stakeholders

Date:   June 29, 2012

Re:      Report on Supply Cushion Methodology – Data files

On June 4, 2012 the MSA released a report entitled ‘Supply Cushion Methodology and Detection of Events of Interest.  To accompany the report we noted that we would make a data set containing the results of alternative approaches available.  That data is contained in the three files below:



/s/ Matt Ayres

Chief Economist