---
title: "The three major A-share indices closed higher at midday, with the optical fiber concept surging"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/283289419.md"
description: "36Kr learned that the three major A-share indices collectively rose during the midday break, with the Shanghai Composite Index up 0.67%, the Shenzhen Component Index up 0.6%, reaching a new high in over four years, and the ChiNext Index up 0.04%; the optical fiber concept surged, with TDii and HYC hitting the daily limit; the cultivated diamond concept strengthened, with LILIANG DIAMOND rising over 8% and Huifeng Diamond rising nearly 5%; lithium battery stocks fell, with Lanxiao Technology dropping over 10% and CATL falling nearly 4%"
datetime: "2026-04-20T03:36:18.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/283289419.md)
  - [en](https://longbridge.com/en/news/283289419.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/283289419.md)
---

# The three major A-share indices closed higher at midday, with the optical fiber concept surging

36Kr learned that the three major A-share indices collectively rose during the midday break, with the Shanghai Composite Index up 0.67%, the Shenzhen Component Index up 0.6%, reaching a new high in over four years, and the ChiNext Index up 0.04%; the optical fiber concept surged, with TDii and HYC hitting the daily limit; the cultivated diamond concept strengthened, with LILIANG DIAMOND rising over 8% and Huifeng Diamond rising nearly 5%; lithium battery stocks fell, with Lanxiao Technology down over 10% and CATL down nearly 4%

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