The fund can't be said to be calculated according to compound interest in essence, but the operation mode of the fund is calculated according to compound interest, because with the increase of the net value of the fund, the increased income becomes a part of the principal. As long as the fund is profitable, then the fund is calculated according to compound interest.

Compound interest means that every interest is added to the principal, and then the next operation continues to generate interest, which is also commonly known as "rolling interest". Investments such as stocks and funds can be regarded as compound interest.

Fund, in English, refers to a certain amount of funds set up for a certain purpose. It mainly includes trust and investment funds, provident funds, insurance funds, retirement funds and funds of various foundations.

From the accounting point of view, capital is a narrow concept, which refers to funds with specific purposes and uses. The fund we are talking about mainly refers to the securities investment fund.

Classification:

First, according to whether fund units can be increased or redeemed, they are divided into open-end funds and closed-end funds. Open-end funds are not traded on the market (as the case may be), but are purchased and redeemed by banks, brokers and fund companies, and the fund scale is not fixed; Closed-end funds have a fixed duration and are generally listed and traded on the stock exchange. Investors buy and sell fund shares through the secondary market.

Two, according to the different organizational forms, can be divided into enterprise funds and contract funds. A fund is established by issuing fund shares to establish an investment fund company, which is usually called a corporate fund; The establishment of fund managers, fund custodians and investors through fund contracts is usually called contractual funds. China's securities investment funds are all contractual funds.

Three, according to the different investment risks and benefits, can be divided into growth, income and balanced funds.

Four, according to the different investment objects, it can be divided into four categories: bond funds, stock funds, money funds and hybrid funds.

Fund form:

It is still uncertain which is the earliest hedge fund. During the great bull market in the United States in the 1920s, there were countless such investment tools specifically for the rich. One of the most famous is the Graham Newman Partnership Fund founded by Benjamin Graham and Jerry Newman.