Actually, many large companies employ traders in their Treasury Group, under the CFO function. As other comments state, this is to hedge risk. Specifically, mos

Actually, many large companies employ traders in their Treasury Group, under the CFO function. As other comments state, this is to hedge risk. Specifically, most big multinational companies have to hedge FX risk constantly. Depending on your industry, you may have specific risks (e.g. I once had a client who was a clothing manufacturer and they had a cotton futures trader on site.)