煤炭股爆发，煤炭ETF（515220）涨超4.6%，资金持续布局

Group 1 - The coal sector has seen a significant surge, with the coal ETF (515220) rising over 4.6% and a net inflow of over 400 million yuan for four consecutive days, bringing the current scale to over 8.8 billion yuan [1] - On the supply side, coal mines are expected to begin holiday breaks as the Spring Festival approaches, making it difficult for coal supply to increase in the short term. Mid-term, capacity reductions and policies related to disaster management in Inner Mongolia are anticipated to gradually roll out, potentially reducing coal supply [1] - On the demand side, power plants are experiencing increased daily consumption, leading to a decrease in available coal days. The demand for coal is expected to improve due to winter heating needs, with previously accumulated coal inventories being gradually depleted [1] Group 2 - The outlook for commodity prices suggests that trends such as loose liquidity, frequent geopolitical disturbances, and rising resource nationalism are likely to continue, which may drive up valuations in the coal sector [1] - The valuation and dividend characteristics of the coal industry are highlighted, with the China Securities Coal Index's price-to-book ratio at only 1.59 times and a dividend yield of 5.82%, indicating a high cost-performance ratio for defensive attributes in the current low-interest market environment [1]