|NRG ENERGY, INC. filed this Form 10-K on 02/29/2016|
In accordance with ASC 815, the following table represents the results of the Company's financial and physical trading of energy commodities for the years ended December 31, 2014, and 2013. The realized and unrealized financial and physical trading results are included in operating revenues. The Company's trading activities are subject to limits within the Company's Risk Management Policy. Beginning in April 2014, the Company's trading activities were primarily transacted through BETM.
Operations and maintenance expense
Operations and maintenance expenses increased by $441 million for the year ended December 31, 2014, compared to the same period in 2013, due to:
Other cost of operations
Other cost of operations, comprised of asset retirement expense, insurance expense, and property tax expense, increased by $93 million for the year ended December 31, 2014, compared to the same period in 2013 due to increased expenses related various projects reaching commercial operations in late 2013 and early 2014, as well as an increase in property tax expense related to the acquisition of EME in April 2014 and the Alta Wind Assets in August 2014.