BOSTON, July 6 (Reuters) - Hedge fund Fortress Investment Group LLC is reshuffling the senior ranks of its macro fund with Michael Novogratz becoming the sole chief investment officer and co-CIO Jeff Feig leaving the company, three sources with knowledge of the changes said.

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This marks the second time in roughly six months that the $70 billion fund company is making changes at its macro fund, which started the year off with heavy losses after being wrong-footed on its Swiss franc trade. (Reporting by Svea Herbst-Bayliss and Nishant Kumar; Editing by Jeffrey Benkoe)