300 funds are mostly due to 300 yuan's money. Generally speaking, stock funds will rise to 100%~ 180% at most in a year, and rarely rise above 200%. Take the income of Alipay Fund in the past year as an example: Qianhai Open Source Public Utilities Stock Fund has the highest increase at present, with the increase or decrease rate of 173.89% in the past year. It is worth noting that this increase or decrease changes every day, subject to the actual situation. For example, suppose: an investor buys a stock fund of 30,000 yuan, with an annual increase of 100%, which is equivalent to earning 30,000 yuan, which adds up to 60,000 yuan. However, it should also be noted that stock funds also have risks, with a return of 100%, and theoretically a loss of 100%, but in fact they generally do not lose 100%. Generally speaking, stock funds lose at most 20%~35%, and few lose more than 50%. Take the income of Alipay Fund in the past year as an example: the lowest fund, XXX Fund, saw its price rise and fall by -30.30% in the past year. It is worth noting that this price fluctuation will change every day, depending on the actual situation. For example, suppose: an investor bought a stock fund of 30,000 yuan, and then lost 30% a year, which is equivalent to a loss of 9,000 yuan. If the principal is large, the loss will be greater under the same circumstances. However, such funds are still relatively few. On the whole, funds have gone up a lot. Therefore, when buying stock funds, we must choose carefully and consider from many aspects, such as the strength of the fund company and how long the fund has been established. It is generally recommended not to choose a newly established fund, unless you are particularly optimistic, then the past performance of the fund manager is also very important, followed by the historical income of the fund and so on. There are many ways to buy stock funds. Generally, one-time investment is not recommended when purchasing, and the risk of one-time investment is too concentrated. Because the stock fund itself is very risky, it is more suitable for the fund to vote, which can spread the risk. It is also worth noting that the fixed investment of the fund is also skillful. For example, investors can set a take profit point or a stop loss point when buying a fund. Take profit as an example. Suppose an investor earns 20% or 40% and redeems it after reaching his goal, so that he can save his money. Finally, when stock funds are sold, investors can set profit points according to the valuation level, mainly for index funds. Because it is difficult for investors to judge whether the fund is at the highest point when buying a fund, when the market valuation is high, then we should pay attention to the possibility that the fund may fall in the future, so we should observe the historical price-earnings ratio of the index and then choose to sell it in batches in different positions.