资深基民了解，一些指数每年调样2次（6月、12月），还有一些指数每年调样4次（3月、6月、9月、12月）。这意味着，每年的6月和12月，股票指数都会迎来一波样本股调整高峰。本周五（12月13日），又到了这样重要的时刻！上证50、沪深300、中证A50、中证A500等宽基或行业/主题指数，成分股调整将于收盘后即刻生效，这不仅对调样个股会有影响，包括跟踪指数的行业格局（权重占比），也将相应发生一些变化...
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