As the National Day holiday approaches, today (September 29) is the second-to-last trading day for the A-share market before the holiday. The market will be closed from October 1 to 7, and tomorrow (September 30) is the last trading day before the holiday. Today and tomorrow are the core operating window for the "one principal, two investments" strategy.

The specific steps are as follows: before 15:30 today, participate in 1-day treasury reverse repo (GC001). Under the interest calculation rules, this locks in 8 days of reverse repo interest over the long holiday, and the funds will be available tomorrow. After the funds arrive tomorrow, buy short-duration interest rate bond ETFs, such as the Treasury Bond and Policy Financial Bond ETF China Merchants (511580), to continue capturing bond coupon income during the National Day holiday.

Among various bond ETFs, short-duration interest rate bond ETFs are more suitable for cash management because of their low sensitivity to interest rate changes and significantly lower volatility than long-duration products. The underlying index of 511580 has a duration of less than 3 years, and its annualized volatility over the past 3 years was only 0.37%. It is worth noting that bond ETFs may be affected by short-term secondary market price fluctuations, so investors need to make rational choices based on their own circumstances.

In addition, the Treasury Bond and Policy Financial Bond ETF China Merchants (511580) has a latest scale of 10.6 billion yuan and has been included in the exchange pledge library. Its standard bond pledge rate is about 104%. Institutional investors can raise funds through positive repo pledges to meet low-cost financing needs. At the same time, 511580 has been included as margin collateral for margin trading and securities lending, with a collateral conversion rate of about 90% (the upper limit for ETFs). MACD golden cross signals have formed, and these stocks are performing well!