A 股 TTM&全动态估值全景扫描（20251220）：A 股估值收缩，商贸零售行业领涨

Core Conclusions - The overall valuation of A-shares has contracted this week, with the retail trade sector leading the gains. The Ministry of Commerce recently held a meeting to promote the "Three New" (new consumption formats, new models, new scenarios) pilot work, providing policy support for industry recovery. The concept of "reward economy" has emerged, further boosting sentiment in the consumption sector. Currently, the overall PB (LF) of the retail trade sector is at the historical 37.0 percentile, indicating significant room for valuation improvement [1][8]. Valuation Overview - This week, the overall PE (TTM) of A-shares decreased from 21.74 times last week to 21.73 times this week, while the PB (LF) remained stable at 1.77 times [10]. - The main board's PE (TTM) increased from 17.46 times last week to 17.54 times this week, and the PB (LF) rose from 1.48 times to 1.49 times [17]. - The ChiNext's PE (TTM) fell from 72.27 times to 71.32 times, and the PB (LF) decreased from 4.27 times to 4.21 times [19]. - The Sci-Tech Innovation Board's PE (TTM) dropped from 210.87 times to 205.59 times, and the PB (LF) fell from 5.17 times to 5.04 times [25]. Relative Valuation Analysis - The relative PE (TTM) of computing power infrastructure, excluding operators/resource categories, decreased from 4.47 times last week to 4.28 times this week, while the relative PB (LF) fell from 4.66 times to 4.46 times [28]. - In terms of static PE (TTM), major industries such as discretionary consumption, consumer staples, midstream manufacturing, cyclical, and midstream materials have absolute and relative valuations above the historical median, with discretionary consumption and consumer staples exceeding the historical 90th percentile [32]. - From the perspective of PB (LF), industries like resources, TMT, cyclical, and midstream manufacturing have absolute and relative valuations above the historical median, while discretionary consumption, midstream materials, financial services, services, and consumer staples are below the historical median [34]. Dynamic Valuation Insights - Analyzing the full dynamic PE, industries such as discretionary consumption, midstream manufacturing, cyclical, and midstream materials have absolute and relative valuations above the historical median, with discretionary consumption exceeding the historical 90th percentile [41]. - The current comparison of odds (PB historical percentiles) and win rates (ROE historical percentiles) indicates that industries like agriculture, public utilities, and oil and petrochemicals exhibit characteristics of low valuation and high profitability [59]. - The comparison of odds (full dynamic PE) and win rates (25-26 consensus expected net profit compound growth rate) shows that industries such as building materials, power equipment, media, and defense industry possess both low valuations and high performance growth [62]. ERP and Yield Spread - The non-financial ERP of A-shares increased from 0.87% last week to 0.89% this week, while the equity-debt yield spread improved from -0.12% to -0.05% [63]. - The full dynamic ERP of key non-financial companies in A-shares rose from 2.77% to 2.80% this week [70].