When observing inflation, we will first consider CPI and PPI, that is, the consumer price index and the ex-factory price index of industrial supplies, but these two data are generally pushed once in 65438+ 10, both of which reflect the previous situation, so there is a certain lag. CRB index is refreshed every 15 seconds/time, and its price is also at the initial stage of production, so it is ahead of the price trend of PPI, and PPI is ahead of CPI. In the overall trend of the whole year, the fluctuation directions of the three are basically the same. Because of its timeliness, it also serves as an indicator to reflect inflation and has a certain early warning function. According to the research in the past decades, the change direction of CRB index and bond interest rate is also very similar.