Pacific Exchange to Trade Five New Options SAN FRANCISCO, June 3 /PRNewswire/ -- The Pacific Exchange (PCX) announced that on Friday, June 4, 2004, it will begin trading options on Administaff, Inc. (NYSE:ASF)(PCX:ASF); Bottomline Technologies, Inc. (NASDAQ:EPAY)(PCX:EEU); MDU Resources Group, Inc. (NYSE:MDU)(PCX:MDU); Oregon Steel Mills, Inc. (NYSE:OS)(PCX:OS) and Otter Tail Corp. (NASDAQ:OTTR)(PCX:OQB). Administaff options will trade on the January expiration cycle with exercise limits set at 3,150,000 shares. Bottomline Technologies options will trade on the January expiration cycle with exercise limits set at 1,350,000 shares. MDU Resources Group options will trade on the January expiration cycle with exercise limits set at 2,250,000 shares. Oregon Steel Mills options will trade on the March expiration cycle with exercise limits set at 1,350,000 shares. Otter Tail options will trade on the January expiration cycle with exercise limits set at 1,350,000 shares. All five issues will be traded by lead market maker Matthew M. Zahner of D.A. Davidson & Co. DATASOURCE: The Pacific Exchange CONTACT: Dale A. Carlson of The Pacific Exchange, +1-415-393-4198 or Web site: http://www.pacificex.com/

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