Photo Library: Spot Market Operation	Back to Previous Page  Download Adobe Reader

The California ISO operates a "spot market" for power and ancillary services needed to keep supply and demand in balance. Less than five percent of the electricity consumed at any given time is traded in the ISO markets that are designed to fine-tune the flow of electricity and maintain operating reserves. Photo by Donald Satterlee Download this image as a TIF file (6.6 megabytes)