Negative fund purchase cost means that the fund falls. The total profit and loss of the fund is negative, that is, the present value of the fund is lower than the original purchase value, the market value of the fund declines, and the fund as a whole is in a state of loss.

Total fund profit and loss = (current market value+cumulative redemption+cumulative reinvestment+cumulative dividend+unconfirmed reinvestment dividend of the day-cumulative investment); Total profit and loss of account = total profit and loss of all funds held in the account.

Extended data

Compared with direct investment bonds, investors investing in bond funds mainly have the following advantages:

1, low risk. Bond funds can effectively reduce the risks that a single investor may face by pooling investors' funds to invest in different bonds.

2. Expert management. With the increasing diversification of bond varieties, ordinary investors should not only carefully study the issuer, but also judge the macroeconomic indicators such as interest rate trend, which is often beyond their ability, while investment bond funds can share the results of expert management.

3. Strong liquidity. If investors invest in illiquid bonds. Only when it is due can it be cashed, and indirectly investing in bonds through bond funds can obtain higher liquidity and can transfer or redeem the bond funds held at any time.

Because the risk brought by stock market fluctuation is too great, they transfer their funds to bond funds through fund conversion and other means.