Bonds and bond funds are positively correlated, because bond funds mainly invest in a basket of bonds. The rise and fall of the fund is determined by the bonds invested. If the bonds invested rise, the fund will rise. If the bonds invested fall, the fund will fall.

During the investment process, investors can simply watch the rise or fall of the fund's net value. If the fund's net value rises, investors will gain profits; if the fund's net value falls, investors will suffer losses.