sweep 里 threshold=-0.05 sharpe=0.914 属于 30 组选 1 的 selection-inflated, 直接注册 v26 = p-hack, 必须先在完全独立的 OOS 样本（如 2026 Q1 live）上独立验证。 正确路径: 保留 v25 (-0.10, 120) 设计参数,持续 live/paper ...
A new learning center is turning video game play into a career path for local children.
在 #17 基础上加 passive CSI300 short 对冲 market beta. 假设 buyback portfolio market beta ≈ 1.0 (小盘偏多, ex-ante 合理估计). **Dollar-neutral hedge**: 每日 short CSI300 = long portfolio gross exposure. 结果组合: 纯 "回购 ...
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