The Stock Market trades shares of Equity, or a piece of ownership in a company, while the Bond Market trades debt, or loans provided to companies, municipals, and even sovereign nations.
The stock market trades securities called Shares of Stock. They represent fractional ownership in a corporation. The commodities market trades securities called Commodities Futures and Commodities...
Stock market, as the name explains deals with the stocks/shares of a company floated at a stock exchange. Commodity markets, deals with commodities such as Oil, Gold, Silver, Grain, Coffee, Cotton...