An asset manager and hedge fund have added their voices to growing criticisms of Dutch bank ABN Amro's "underperforming" share price following calls for it to be broken up by The Children's Investment Fund last week.

Tom Gordijn, a spokesman for SNS Asset Management, the fund management subsidiary of Dutch bank SNS and which owns 0.2% of ABN Amro, said: "We are critical of ABN Amro because the share price has not performed well."