Yes, stocks and funds are calculated according to compound interest. Stocks and funds can't be said to be calculated by compound interest in essence, but the operation mode of stocks and funds is calculated by compound interest, because with the rise of stock price or the rise of fund net value, the rising income becomes a part of the principal. As long as stocks and funds are profitable, then stocks and funds are calculated by compound interest.

For example, if an investor buys a stock at the price of 10 yuan, and 1000 shares, the investor's principal is 10000 yuan. When the stock price rises to 1 1 yuan per share, the investor's principal becomes 1 1000 yuan. The same is true of funds. For example, when an investor buys a fund with a net value of 1 or 1 000, the investor's principal is 1 000 yuan. When the net value of the fund rises to 1. 1, the investor's principal becomes 1, 000 yuan.