Energy Future Holdings Corp, the biggest power company in Texas, won a ruling on Wednesday in a $431 million dispute with its noteholders that should bolster its plans for emerging from bankruptcy.

The ruling denied noteholders an avenue to collect a “make-whole” payment from a unit of Energy Future for redeeming securities early. The opinion is also one of the first by a judge in the busy U.S. Bankruptcy Court in Wilmington, Delaware, in an area that has become hotly contested in corporate restructurings.

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