Profits at Icap, the world's largest interdealer broker, rose 16% to an all-time high of £204.3m (€298.6m) in the year to March 31, driven by recent market volatility and electronic trading, where profit margins exceeded 30% for the first time.

Group revenues rose 13% to £919.2m, with a 17% increase in electronic broking revenues to £98.3m for the full year.