The WorldCommodity Fund, which holds about 70% in basic materials like precious metals and 30% in energy stocks, has returned 13.3% this year to date.

FORBES: Mutual Fund Inflows This Year Went To Silver, Gold and Oil

Like Brown, McManus missed the start of this season through injury and the Celtic captain has just returned to training in time to be linked with a move away from the club.

BBC: Everton eyeing up Celtic's Brown