---
title: "A-share midday review: Three major indices fluctuate weakly, Deep Sea Technology and reducer concept surge"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/232508726.md"
description: "On the morning of March 20th, the three major indices experienced weak fluctuations. By the close of the midday session, the Shanghai Composite Index fell by 0.07%, the Shenzhen Component Index fell by 0.12%, and the ChiNext Index fell by 0.14%. On the market, the seafood sector surged strongly, with SKMIC, COFC, and BAIYANG hitting the daily limit; reducer concept stocks continued to be active, with Zhongma Transmission, Donly, and Southern Precision hitting the daily limit; deep-sea technology, industrial mother machines, and AI glasses concept stocks were repeatedly active, while energy equipment, shipping, and steel sectors saw significant gains. The liquor and insurance sectors declined. The total market turnover for the half-day was approximately 880 billion yuan, with over 3,300 individual stocks rising"
datetime: "2025-03-20T03:33:30.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/232508726.md)
  - [en](https://longbridge.com/en/news/232508726.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/232508726.md)
---

# A-share midday review: Three major indices fluctuate weakly, Deep Sea Technology and reducer concept surge

According to Jinshi Data on March 20, during the morning session on March 20, the three major indices experienced weak fluctuations. By the close of the morning session, the Shanghai Composite Index fell by 0.07%, the Shenzhen Component Index fell by 0.12%, and the ChiNext Index fell by 0.14%. On the market, the seafood sector surged strongly, with SKMIC, COFC, and BAIYANG hitting the daily limit; the reducer concept stocks continued to be active, with Zhongma Transmission, Donly, and Southern Precision hitting the daily limit; deep-sea technology, industrial mother machines, and AI glasses concept stocks were repeatedly active, while energy equipment, shipping, and steel sectors saw significant gains. The liquor and insurance sectors declined. The total market turnover for the half-day was approximately 880 billion yuan, with over 3,300 stocks rising

### Related Stocks

- [002696.CN](https://longbridge.com/en/quote/002696.CN.md)
- [600097.CN](https://longbridge.com/en/quote/600097.CN.md)
- [000798.CN](https://longbridge.com/en/quote/000798.CN.md)
- [002164.CN](https://longbridge.com/en/quote/002164.CN.md)
- [603767.CN](https://longbridge.com/en/quote/603767.CN.md)
- [399006.CN](https://longbridge.com/en/quote/399006.CN.md)
- [002553.CN](https://longbridge.com/en/quote/002553.CN.md)

## Related News & Research

- [Key facts: Tata Steel strong Q4; Netherlands unit EBITDA-positive](https://longbridge.com/en/news/286842740.md)
- [China tightens steel capacity rules as Thyssenkrupp exits US plant](https://longbridge.com/en/news/286786661.md)
- [‘Chicken wine’ ad banned for implying alcohol is therapeutic](https://longbridge.com/en/news/287029011.md)
- [16:51 ETBeverly Hills MD ProRetinol Age Rewind x3 Officially Launches: A New Era of Gentle, Slow-Released Retinol Skincare Backed by Plastic Surgeons](https://longbridge.com/en/news/286966075.md)
- [18:47 ETJoybird Gallery Experience Comes to Furniture Row in Draper, UT](https://longbridge.com/en/news/286826351.md)