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A new index for electricity spot markets

  • Falbo, Paolo
  • Fattore, Marco
  • Stefani, Silvana

Different indexes are used in electricity markets worldwide to represent the daily behavior of spot prices. However, the peculiarities of these markets require a careful choice of the index, based on mathematical formulation and its statistical properties. Choosing a bad index may influence the financial policies of market players, since derivative pricing and hedging performance can be deeply affected. In this paper with an initial theoretical analysis, we intend to show that the most widely used indexes (simple arithmetic average and weighted average with current volumes) are poor representatives of the spot market. We will then perform an analysis of the hedging strategy on a derivative instrument (an Asian option) written on a reference index. The resulting simulations, applied to OMEL (Spain) and EEX (Germany), are sufficiently clear cut to suggest that the decision to adopt an index to represent properly a market must be taken very carefully. Finally we will propose a new index (FAST index) and, after comparing it with the previous indexes, will show that both theoretically and practically this index can be taken as a good electricity market synthetic indicator.

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Article provided by Elsevier in its journal Energy Policy.

Volume (Year): 38 (2010)
Issue (Month): 6 (June)
Pages: 2739-2750

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Handle: RePEc:eee:enepol:v:38:y:2010:i:6:p:2739-2750
Contact details of provider: Web page: http://www.elsevier.com/locate/enpol

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  1. Mario Forni & Marc Hallin & Lucrezia Reichlin & Marco Lippi, 2000. "The generalised dynamic factor model: identification and estimation," ULB Institutional Repository 2013/10143, ULB -- Universite Libre de Bruxelles.
  2. Catherine D. Wolfram, 1999. "Measuring Duopoly Power in the British Electricity Spot Market," American Economic Review, American Economic Association, vol. 89(4), pages 805-826, September.
  3. Geman, Hélyette & Roncoroni, Andrea, 2003. "A Class of Marked Point Processes for Modelling Electricity Prices," ESSEC Working Papers DR 03004, ESSEC Research Center, ESSEC Business School.
  4. Natalia Fabra & Juan Toro, 2001. "Price Wars and Collusion in the Spanish Electricity Market," Economic Working Papers at Centro de Estudios Andaluces E2001/05, Centro de Estudios Andaluces.
  5. Mello, Antonio S & Parsons, John E, 2000. "Hedging and Liquidity," Review of Financial Studies, Society for Financial Studies, vol. 13(1), pages 127-53.
  6. Fattore, Marco, 2010. "Axiomatic properties of geo-logarithmic price indices," Journal of Econometrics, Elsevier, vol. 156(2), pages 344-353, June.
  7. repec:cup:cbooks:9780521889070 is not listed on IDEAS
  8. Deng, S.J. & Oren, S.S., 2006. "Electricity derivatives and risk management," Energy, Elsevier, vol. 31(6), pages 940-953.
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