光模块概念强势反弹，科创创业50ETF（159783）涨超1.5%，机构称本轮调整或接近尾声

Group 1 - Major indices such as Chuangzhang, ChiNext 50, ChiNext Index, and Sci-Tech Innovation 50 showed leading gains in the afternoon of October 20, with sectors like telecommunications, coal, electronics, and power equipment performing well [1] - Concept sectors including cultivated diamonds, optical module CPO, lithium battery electrolyte, optical chips, and 6G were notably active [1] - The Sci-Tech Innovation 50 ETF (159783) rose over 1.5%, with top holdings like Tianfu Communication, Zhongji Xuchuang, and Huayun Micro leading the gains [1] Group 2 - The recent pullback in the technology sector is analyzed through wave theory, suggesting that the adjustment of the Sci-Tech Innovation 50 may be in the A wave phase of a larger fourth wave adjustment [1] - A significant drop below the high point from late August during last Friday's adjustment is a key reason for classifying the current adjustment as a fourth wave [1] - The high-frequency temperature index for the Sci-Tech Innovation 50 has fallen below 20, indicating that the current adjustment may be nearing its end [1] Group 3 - The Sci-Tech Innovation 50 ETF (159783) tracks the CSI Sci-Tech Innovation 50 Index, which selects 50 leading companies with the largest market capitalization and pure technology attributes from the ChiNext and Sci-Tech boards [2] - This index combines the advantages of both the Sci-Tech and ChiNext boards, selecting high-tech stocks from the Sci-Tech board and growth-oriented, profitable stocks from the ChiNext board [2]