Sector 4-Firm HHI (top 50) Food Manufacturing (311) 16.8 118.7 Malt Manufacturing (311213) 91.4 2,192.4 Breakfast cereal manufacturing (31123) 82.1 2,999.6 Motor Vehicle Mfg (3361) 81.2 2,323.5 Metal household furniture manufacturing 27.6 308.2 (337124) Guided missile and space vehicle 95.3 Not manufacturing (336414) Disclosed Breweries (31212) 90.8 Not Disclosed Based upon the above data, ceteris paribus, Breakfast cereal manufacturing operates in a market. O monopolistically competitive O monopoly O perfectly competitive O oligopoly