The Dow Jones report is compiled of data sent from many different  counterparties.
The lovely people at Dow Jones painstakingly analyze the data  to ensure its accuracy.
Averaged together, these prices become the Dow Jones  daily index price.
And that's the long and short of it.
The process, as you've guessed by now, is a little more complicated than  that.
For one thing, Dow Jones looks at each counterparty's sales to reach an  average of all the prices.
It would be redundant for each counterparty to  ALSO report their purchases from each other.
Therefore, when calculating the  Dow Jones data, we only include purchases from counterparties who ARE NOT  participants in the Dow Jones survey.
Following is a simple example:  Participant List  NP-15 Purchases  NP-15 Sales  Reported NP-15 Purchases  Reported NP-15 Sales Sempra  Sempra - $250   Sempra - $250  Avista - $270   Sempra - $250 Duke   Duke - $260   Duke - $260      Duke - $260 Enron   Avista - $270   Avista - $270      Avista - $270  Now that's simple!
Following is the participant list for Dow Jones' survey of trading at NP-15  and SP-15 delivery points.
Deals with these counterparty names need to be  excluded from the calculation of PURCHASES at NP-15 and SP-15 delivery points.
American Electric Power - Amerelecpo Avista Energy - Avistaene Duke Energy Trading and Marketing - Dukeenetra El Paso Merchant Energy Enron Power Marketing, Inc. - EPMI Idaho Power Company - Idacorpene PacifiCorp - PACE Pacific Gas & Electric Company - PG&E Powerex Corp. - PWX Puget Sound Energy, Inc. - PSPL Mirant Americas Energy Marketing (formerly Southern Company Energy Marketing)  - SCEM TransAlta Energy Marketing (US) Inc. - Transalt  So I've probably succeeded in confusing you even more, but please feel free  to come bug me with questions.
Good luck!
Kate

Dow Jones Report
The Dow Jones report is compiled of data sent from many different counterparties.
The lovely people at Dow Jones painstakingly analyze the data to ensure its accuracy.
Averaged together, these prices become the Dow Jones daily index price.
And that's the long and short of it.
The process, as you've guessed by now, is a little more complicated than that.
For one thing, Dow Jones looks at each counterparty's sales to reach an average of all the prices.
It would be redundant for each counterparty to ALSO report their purchases from each other.
Therefore, when calculating the Dow Jones data, we only include purchases from counterparties who ARE NOT participants in the Dow Jones survey.
Following is a simple example: Participant List NP-<NUMBER> Purchases NP-<NUMBER> Sales Reported NP-<NUMBER> Purchases Reported NP-<NUMBER> Sales Sempra Sempra - <CUR><NUMBER> Sempra - <CUR><NUMBER> Avista - <CUR><NUMBER> Sempra - <CUR><NUMBER> Duke Duke - <CUR><NUMBER> Duke - <CUR><NUMBER> Duke - <CUR><NUMBER> <COMPANY> Avista - <CUR><NUMBER> Avista - <CUR><NUMBER> Avista - <CUR><NUMBER> Now that's simple!
Following is the participant list for Dow Jones' survey of trading at NP-<NUMBER> and SP-<NUMBER> delivery points.
Deals with these counterparty names need to be excluded from the calculation of PURCHASES at NP-<NUMBER> and SP-<NUMBER> delivery points.
American Electric Power - Amerelecpo Avista Energy - Avistaene Duke Energy Trading and Marketing - Dukeenetra El Paso Merchant Energy <COMPANY> Power Marketing, Inc. - EPMI Idaho Power Company - Idacorpene PacifiCorp - PACE Pacific Gas & Electric Company - PG&E Powerex Corp. - PWX Puget Sound Energy, Inc. - PSPL Mirant Americas Energy Marketing (formerly Southern Company Energy Marketing) - SCEM TransAlta Energy Marketing (US) Inc. - Transalt So I've probably succeeded in confusing you even more, but please feel free to come bug me with questions.
Good luck!
Kate
simple example good luck kate americas energy marketing sempra cur number redundant counterparty painstakingly analyze data points deals dow jones report ensure accuracy averaged