PENNEY SUED: Macy's Inc. has sued rival retailer J.C. Penney Co., in a bid to block Penney from selling products by Martha Stewart Living. Macy's claims it has an exclusive contract to sell certain types of products from Martha Stewart Living that makes a sales agreement struck last fall between Penney and Martha Stewart Living illegal.

COMPETITIVE ADVANTAGE: Macy's claims Penny seeks to destroy the competitive advantage Macy's has under its exclusive sales deal with Martha Stewart Living.

NO BREACH: Martha Stewart Living has said it does not think its agreement with Macy's was breached.