金工ETF点评：宽基ETF单日净流出38.47亿元，家电、通信拥挤变幅较大

• 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 report constructs a premium rate Z-score model to screen ETF products for potential arbitrage opportunities[4] - The industry congestion monitoring model indicates that the congestion levels of the power equipment and chemical industries were high on the previous trading day, while the congestion levels of the computer and automotive industries were relatively low[3] - The premium rate Z-score model provides signals for ETF products, indicating potential arbitrage opportunities and cautioning about the risk of pullbacks[4]