Following a nightmare campaign which saw the Red Devils finish sixth and fail to qualify for the Champions League, the controlling company which owns the club has seen 25% of its worth vanish.
Manchester United Plc was trading at $3.17bn (£2.5bn) on Monday morning despite being valued at an all-time high of $4.27bn (£3.31bn) at the beginning of last season.
The lack of optimism at Old Trafford has been reflected in the markets, with shares costing $18.08, down from $26.20 ten months ago.
It is understood that failing to qualify for the Champions League has cost the club around £80m in UEFA payments, sponsorship deals and ticket sales.
Red Devils fans have stepped up their protests against the Glazers in recent weeks, demanding the owners sell the club and move on.
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