Federal Realty Investment Trust (NYSE: FRT) and Swedish furniture and home accessories retailer, IKEA, recently completed a land swap at the site of Federal's Assembly on the Mystic redevelopment project in Somerville, MA (a Boston suburb). Under terms of the swap, Federal took on 16.6 acres of Mystic River waterfront property, while IKEA took on 11.9 acres closer to I-93.