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SEC Filing Details

10-K
NRG ENERGY, INC. filed this Form 10-K on 03/01/2018
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Generation gross margin and economic gross margin
Generation gross margin decreased $26 million and economic gross margin decreased $546 million, both of which include intercompany sales, during the year ended December 31, 2017 compared to the same period in 2016.

The tables below describe the changes in Generation gross margin and in economic gross margin:

Gulf Coast Region
 
(In millions)
Lower gross margin due to a 14% decrease in average realized prices primarily in Texas due to lower hedged power prices
$
(315
)
Lower energy margins due to increased supply cost on load contracts
(48
)
Lower capacity margins on contract expirations and lower demand in South Central business
(27
)
Lower gross margin due to lower gas generation driven by the current mothball status of Gregory in Texas
(17
)
Lower gross margin due to a 24% decrease in ISO capacity prices and a 76% decrease in volume
(14
)
Higher gross margin due to a 17% increase in coal generation mainly in Texas driven by the timing of planned and unplanned outages
68

Other
(5
)
Decrease in economic gross margin
(358
)
Increase in mark-to-market for economic hedging primarily due to net unrealized gains/losses on open positions related to economic hedges
499

Decrease in contract and emission credit amortization
(2
)
Increase in gross margin
$
139

East/West Region
 
(In millions)
Lower gross margin from commercial optimization activities
$
(59
)
Lower gross margin due to a decrease in generation driven by lower economic generation due to milder weather conditions and the Will County outage
(54
)
Lower gross margin due to lower load contracted prices coupled with slightly lower volumes
(28
)
Lower gross margin due to a lower cost of market adjustment for fuel oil inventory
(33
)
Lower gross margin by BETM due to higher gains in 2016 on over the counter strategies, offset in small part by higher gains in 2017 congestion strategies
(20
)
Other
6

Decrease in economic gross margin
$
(188
)
Increase in mark-to-market for economic hedging primarily due to net unrealized gains/losses on open positions related to economic hedges
22

Increase in contract and emission credit amortization
1

Decrease in gross margin
$
(165
)


72