中银量化大类资产跟踪：近期国家队与社保资金托举A股企稳回升

• The report does not contain any specific quantitative models or factors for analysis and construction[1][2][3] - The report provides a detailed overview of A-share market trends, including style performance, valuation, and fund flows, but does not elaborate on quantitative models or factors[18][59][84] - The report discusses style indices such as "momentum vs reversal" and "small-cap vs large-cap," but these are presented as market observations rather than constructed quantitative factors or models[59][60][78]