Turin - Shares in Italian club Juventus plunged nearly 21% in early trading on Wednesday after Cristiano Ronaldo's side were knocked out of the Champions League at the quarter-final stage by Ajax.
Juventus shares were down 17.7% at 1.39 euros at 09:30 SA time after plunging nearly 21% when trading in Milan began.
The costs of their shock exit to Ajax has reportedly cost the club €400 million.
Shares in the Turin-based club had risen sharply last year following the signing of Ronaldo from Real Madrid.
A young Ajax team stunned Juventus to reach the Champions League semi-finals for the first time since 1997 as Matthijs de Ligt's second-half header secured a 2-1 second-leg victory in Italy on Tuesday.
The defeat halted Ronaldo's bid for a sixth Champions League title.