LUK Leucadia National Corp.

FXCM Inc. is in talks with Jefferies Group LLC for a rescue package of $200 million to $300 million, according to a person familiar with the matter.

A private-equity capital injection is another option for the beleaguered foreign-exchange broker, the person said. However, a deal with Jefferies was seen as likely to happen faster, possibly as soon as Friday, said the person.

Jefferies is part of Leucadia National Corp. Stock trading in Leucadia was recently halted. FXCM trading was halted ahead of the opening bell.

News of the talks was earlier reported by other media organizations, including Reuters.

Write to Telis Demos at telis.demos@wsj.com

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