金融工程日报：沪指缩量震荡，消费电子、CPO概念持续火热-20250819

The provided content does not contain any specific quantitative models or factors, nor does it include their construction processes, formulas, evaluations, or backtesting results. The documents primarily discuss market performance, sector and concept index movements, market sentiment, capital flows, ETF premiums/discounts, block trading discounts, and institutional activities. These are general market observations and statistics rather than detailed quantitative models or factor analyses.