July 6 (Reuters) - AGL Energy Ltd AGL.AX :
* Expects total pre-tax contribution to margin from its energy markets gas portfolio in FY 2017 to be lower than FY 2016 by at least $100 million
* Says expects a negative impact on its pre-tax wholesale gas margin in the first quarter of FY 2017 of approximately $35 million
* Says acquired a higher than anticipated proportion of wholesale gas for the first quarter of FY 2017 from spot market and other short-term sources
* There is no change to AGL's FY 2016 guidance for underlying profit in the upper half of the guidance range of $650 million to $720 million"
* Source text for Eikon ID:nASX1kfztB
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