Core Retail Sales

Your primary product is nighties for...big-boned people. You sell 'em for $50 each and they cost you $10, despite needing lots of fabric. You also purchased some chocolate distributors and a low-impact aerobic chain of gyms.

Your core product is the nightie. When Wall Street values your stock, most of what they care about is nightie sales and growth and margins. Those are core. The other stuff is just kinda "there" and kinda "nice to have," but not that relevant to the total picture.

Why? Because they're small. You're not the dominant player in them. You don't set pricing. You don't run and rule the market. So they're meh, i.e. not core.