Derivative products are attached to the basic products, so the so-called skin does not exist, but the hair will be attached. Related but relatively independent products, such as gold futures, gold trading belongs to financial basic products, 300 yuan buys/gram, 320 yuan sells/gram, and makes a net profit of 20 yuan/gram. The transaction of physical products is called financial basic products, and the gold transaction belongs to monetary and financial basic products, in addition to bonds and stocks; Gold futures, based on gold trading, is a paper contract, not physical gold, so it is called virtual trading or derivative trading. Without gold trading, there would be no gold futures. Therefore, derivatives are attached to the basic products, and the rise and fall of gold futures prices or whether both parties make money does not depend entirely on the rise and fall of gold prices, so it reflects its relatively independent side.

The basic products and basic variables you mentioned are just different in classification. For example, basic products include gold, and basic variables include bonds and stocks.