Stock refers to things traded in the stock market, which involves a company's management right and income distribution right, and is a symbol of power. Futures are standardized contracts, and can also be traded in corresponding trading markets (such as new york Futures Market). Both parties agree to trade certain commodities (such as stocks, bonds, physical objects, foreign exchange, etc.). ) at a certain price (or exchange rate, etc. ) At some point in the future. Spot can be understood as giving money with the left hand and getting goods with the right hand. For example, the oil spot market and the gold spot market. A fund is a collective investment. An investor doesn't have much money and can't buy many stocks, bonds or other things (according to economic theory, diversification can reduce the risk of investment). The fund just puts these investors' money together and makes investments together. I am exhausted from typing this word. . .