BOSTON, Feb 24 (Reuters) - Billionaire investor William
Ackman's Pershing Square (N:SQ) Holdings portfolio has lost 17.3
percent since January, the firm told investors on Wednesday.
The firm did not say what caused the decline, but shares in
Valeant Pharmaceuticals (N:VRX) International VRX.TO , a big bet for
Ackman, tumbled late last week and early this week.