After the passage of the deregulation law, California had a total of 38 Stage 3 rolling blackouts declared, until federal regulators intervened during June 2001. These blackouts occurred as a result of a poorly designed market system that was manipulated by traders and marketers, as well as from poor state management and regulatory oversight. Subsequently, Enron traders were revealed as intentionally encouraging the removal of power from the market during California's energy crisis by encouraging suppliers to shut down plants to perform unnecessary maintenance, as documented in recordings made at the time. These acts contributed to the need for rolling blackouts, which adversely affected many businesses dependent upon a reliable supply of electricity, and inconvenienced a large number of retail customers. This scattered supply increased the price, and Enron traders were thus able to sell power at premium prices, sometimes up to a factor of 20x its normal peak value.