Business and Personal Finance Dictionary

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• ON-PEAK
  
  Refers to hours of the business day when demand is at its peak. For example, the NYMEX Division California-Oregon border and Palo Verde electricity futures contracts define the on-peak period from the hour ending 0700 to the hour ending 2200 (6 A.M. to 10 P.M.), Pacific prevailing time. In the physical market, on-peak definitions vary by North America Electric Reliability Council region. Can also refer to the number of business days in any one month on which it is contracted that electricity is delivered. Patterns of the number of on-peak days in a week generally also vary by region.
  
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