策略周思考：“内卷式”消灭1到2倍市净率和“反内卷”行情

Group 1 - The report highlights a significant reduction in the proportion of stocks with a price-to-book (PB) ratio of 1-2x, dropping from approximately 45% in early April to below 30% by late July, indicating a market trend towards eliminating low PB stocks [1][11][12] - Historical analysis shows that the complete elimination of 1-2x PB stocks occurred only during specific periods, such as 2014-2015, driven primarily by active leverage in the market [14][17][22] - The report identifies necessary but insufficient conditions for the systematic elimination of 1-2x PB stocks, including the continuous expansion of profit effects, influx of incremental funds, and alignment of fundamental expectations across various styles [2][26] Group 2 - The "anti-involution" phenomenon is characterized by a two-phase excess return path in heavy asset industries, transitioning from "ROA→, PB↑" to "ROA↑, PB→" [3][36] - The report references the previous supply-side structural reforms in 2016, where industries like coal and steel experienced significant price and volume reversals, driven by policy changes that addressed overcapacity [29][32] - Current core industries under the "anti-involution" theme include photovoltaic materials, cement, and basic chemicals, with a focus on selecting companies that maintain cash flow despite profit losses [39][43]