Yes, the capital preservation fund does exist in the fund. Capital preservation fund refers to the fund manager's commitment that the net value of fund shares is not less than a certain value, usually 1 yuan. This means that investors can still get the guarantee of the principal at the end of the agreed period even if the net value of the fund declines due to market fluctuations.

Principal guaranteed fund usually adopts some capital preservation strategies, such as investing in low-risk fixed-income products, such as treasury bonds and bank deposits, to ensure the safety of the fund principal. In addition, the capital preservation fund may also adopt some hedging strategies, such as options and futures, to reduce market risks.

It should be noted that the capital preservation fund does not mean that the investment is risk-free, and market fluctuations may still lead to a decline in the net value of the fund. In addition, capital preservation funds usually have certain constraints and restrictions, such as long investment period and high redemption cost.

When choosing a capital preservation fund, investors should carefully understand the investment strategy, risk-return characteristics and related expenses of the fund, and make reasonable choices according to their own risk tolerance and investment objectives.