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The paper selects the price index of wheat, corn and soybean from January 2002 to April 2022 in feed industry information network, and analyzes the asymmetry and persistence of feed raw material price fluctuation in China using the Markov regional system transformation model. The results showed that the fluctuation risk and mutual transfer of feed raw material prices in different stages in China were asymmetric, that is, the fluctuation risk of wheat price, corn price, and soybean price in the falling stage was greater than that in the rising stage. There is a big gap between the average duration and duration probability of wheat price in each stage in China. In the average duration, compared with the 'falling stage', the duration of corn and soybean prices in the 'rising stage' is obviously higher, while the duration of wheat prices is opposite. From the analysis of persistence probability, the persistence probability of wheat in 'sliding stage' is the highest, and that of corn in 'rising stage' is the highest, which is similar to the conclusion of average duration. The research has important reference value for stabilizing the price of feed raw materials and promoting the sustainable development of feed raw materials industry. [ABSTRACT FROM AUTHOR]

This paper aims to analyze the characteristics and influencing factors of broiler price fluctuation, which is beneficial to promote the healthy and stable development of poultry breeding industry. Based on the sample data of 252 broiler feed enterprises in China from January 2002 to December 2022, after passing the stability test, VAR model and variance decomposition method were used to analyze the main factors causing the fluctuation of broiler feed price in China from the aspects of broiler feed price, supply, and demand. The results showed that at the supply level, the main influencing factors of broiler feed price fluctuation were corn stock and soybean meal stock, and the impact of corn stock and soybean meal stock on broiler feed price in the seventh period were 30.78% and 20.39%, respectively. At the demand level, in the seventh period, the per capita disposable income of rural residents and the stock of fertile broilers had a relatively high impact on broiler feed prices, which were 9.06% and 6.87%, respectively. The results showed that the price fluctuation of broiler feed was most affected by the price of broiler feed itself, followed by corn stock, soybean meal stock, per capita disposable income of rural residents, breeding hens stock, fish and shrimp price, broiler stock, beef price, and per capita disposable income of urban residents. [ABSTRACT FROM AUTHOR]