国产替代午后暴涨，半导体设备ETF（159516）涨近5%，盘中流入近2亿份，规模超40亿元居同类第一

Core Insights - The domestic semiconductor equipment ETF (159516) surged nearly 5% in the afternoon, with inflows of nearly 200 million, making its total scale exceed 4 billion, ranking first among similar products [1] - Since 2018, the domestic semiconductor industry has been on a path of self-sufficiency, achieving rapid growth, but the "bottleneck" issues remain concentrated in the equipment sector, particularly in photolithography machines, which have extremely high technical barriers [1] - The current domestic substitution rate for photolithography machines is nearly 0, posing a core constraint for the domestic semiconductor industry to advance to higher process nodes [1] Industry Overview - The overall investment logic in the semiconductor equipment industry revolves around "domestic substitution + self-sufficiency" [1] - In critical equipment segments such as etching machines and thin-film deposition, the current domestic substitution rate is still below 20%, but domestic companies are gradually achieving breakthroughs through technological research and development [1] - The semiconductor materials and equipment index (931743), tracked by the semiconductor equipment ETF, focuses on the upstream materials and equipment sectors of the semiconductor industry, selecting listed companies involved in semiconductor material supply and equipment manufacturing [2]