The Los Angeles Times conducted an analysis of civil penalties issued by the Federal Energy Regulatory Commission for the Dec. 14, 2017 story "Why Wall Street gets a cut of your California power bill."
It found that federal regulators have assessed $1.6 billion in penalties against traders, banks, utilities, power producers and grid operators for various violations since anti-manipulation laws were enacted by Congress in 2005. More than a third of the assessed penalties have been tied to California’s energy market.
The results can be reproduced in the analysis notebook found in this repository.