The US Energy Information Administration has published wholesale day-ahead prices & volumes for selected ICE hubs through 10/28/11. There is some missing data such as ERCOT Peak for zones other than the South. The data is in the MS Excel format. This could allow some comparisons among several hubs. Some consumer index contracts use ICE as the price for the market.
Looking at the NEPool Data for 2011:
- average high price $56.18/mWh
- average low price $53.73/mWh
- average daily volume 25,797 mWh
- average number of trades 29 per day
- average number of companies 16.55 per day
The number of trades is rather thin compared to the number of companies. It is possible that each company did 1 or 2 trades per day.
Contrast the NEPool with PJM West data:
- average high price $55.84/mWh
- average low price $55.55/mWh
- average daily volume 1585 mWh
- average number of trades 1.95 per day
- average number of companies 2.46 per day
The activity in PJM West is no where like the NEPool.
The SP-15 zone in California dwarfs these two other hubs.
- average high price $37.61/mWh
- average low price $36.50/mWh
- average daily volume 50,530 mWh
- average number of trades 73.79 per day
- average number of companies 22.84 per day
Say what you may about California electricity competition this is an active market. While their gasoline prices may be high the commercial electricity costs are very low.