A sharp drop in mortgage interest rates is threatening a deal between a suburban Chicago bank and a neighboring thrift.

FBOP Corp. in Oak Park, Ill., is looking to knock $4 million off its $112 million offer for Calumet Bancorp, Dolton, Ill., because of concerns over Calumet's mortgage business.

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.