This skill should be used when the user asks '这只股票贵不贵', '估值合理吗', '目标价多少', '跟同行比怎么样', or during a stock-analyzer valuation step. Calculates PE/PB/PS historical percentiles, builds peer-comparison tables, and derives target prices via PE-based or PB-based methods. Quantitative/relative valuation — distinct from the DCF-style intrinsic-value-analysis skill.
