Shares of Mellon Bank Corp. sagged again on Thursday, as Wall Street continued to fret about the controversy swirling around Boston Co., the Pittsburgh bank's money management subsidiary.

Mellon was off 87.5 cents to $53.625 in late afternoon trading. The stock has surrendered 10.6% in value this week and has been the weakest major bank issue in the market.

Subscribe Now

Access to authoritative analysis and perspective and our data-driven report series.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.