Secondary capital bond is a special kind of financial bond, which is mainly issued by commercial banks to supplement their secondary capital and improve their capital adequacy ratio. The main difference between tier-two capital bonds and ordinary bank bonds is that tier-two capital bonds contain subordinated clauses and write-down clauses. Sub-clause means that tier-two capital bonds rank behind depositors and ordinary creditors in the order of repayment, that is, if the bank goes bankrupt and liquidates, the holders of tier-two capital bonds can only be paid off after other creditors have been paid off. The write-down clause means that tier 2 capital bonds may be partially or completely written off, and the losses of banks may be passed on to investors. Therefore, the risk of buying Tier 2 capital bonds is relatively high. Investors should pay attention to the following aspects when buying bonds:

1. Understand the basic knowledge and issuance information of bonds. Bond is a kind of valuable securities, and it is a debt certificate that the issuer promises to repay the principal and interest according to the agreed interest rate and term. Investors should pay attention to bond issuance information, such as bond face value, coupon rate, interest payment method, maturity date, etc. Different types of bonds have different risk returns. If investors have low risk tolerance, they can consider investing in bonds with high credit rating, such as national debt.

2. Pay attention to changes in market interest rates and inflation. Market interest rate and inflation are important factors affecting bond prices and returns. Bond prices are usually negatively correlated with market interest rates. When interest rates rise, bond prices may fall. Inflation will lead to a decline in the purchasing power of money, thus reducing the real income of bonds.

3. Diversify investment and reduce risks. Investors can diversify their risks by choosing bonds of different types, maturities, ratings and regions. If it is difficult for investors to choose bonds, they can also consider giving funds to professional institutions for investment, such as buying financial products such as bond funds, so that they can enjoy the investment services of professional fund managers, saving time and effort.