金工ETF点评：宽基ETF单日净流出100.61亿元，煤炭行业拥挤度持续增加

• The report constructs an industry congestion monitoring model to monitor the congestion levels of Shenwan First-Level Industry Indexes on a daily basis[3] - The premium rate Z-score model is used to build a related ETF product screening signal model, providing potential arbitrage opportunities[4] - The industry congestion monitoring model indicates that the congestion levels of the power equipment, coal, and non-ferrous industries were high on the previous trading day, while the congestion levels of media, social services, and computers were relatively low[3] - The premium rate Z-score model involves rolling calculations to identify potential arbitrage opportunities and warns of potential pullback risks[4]