NATIONAL MARKETS, St. Louis, lost almost $13 million in the fiscal year ended Feb. 29, up from $10 million the year earlier, according to papers filed in U.S. bankruptcy court in St. Louis. As reported, the 17-store company filed for bankruptcy under Chapter 7 and is liquidating its assets. The privately held chain was created three years ago in a purchase of stores cast off by locally based Schnuck markets. Court papers also disclosed that National has assets of $15.8 million and liabilities of $31.9 million. The largest creditor is Fleming Cos., Oklahoma City, with a secured claim of $10.5 million. The bankruptcy trustee will be auctioning store leases and fixtures on May 26.