A-Shares Memory Chip Sector Tumbles in Broad-Based Sell-Off

The trading session on July 28th painted a bleak picture for China's semiconductor sector, with memory chip stocks bearing the brunt of a significant market downturn. From the opening bell, selling pressure mounted across the board, culminating in deep losses for numerous related companies by the close.

Key Losers: Industry Leaders Not Spared

The decline was characterized by a sector-wide movement rather than isolated stock performance. Market attention centered on leading memory design firm Gigadevice, whose shares hit the 10% daily limit-down, setting a negative tone for the sector.

The list of significant decliners spanned multiple points in the supply chain:

  • Purain led the losses, plummeting over 11%.
  • PCB and substrate suppliers like Shennan Circuits and Shengyi Technology saw sharp drops, nearing limit-down and falling over 8%, respectively.
  • Chip design and testing/assembly companies, including Ingenic Semiconductor and Tongfu Microelectronics, declined more than 7%.
  • Downstream module and distribution firms such as Biwin Storage and Shannon Semiconductor also fell over 6%.

Additionally, more than ten other stocks, including Montage Technology, Longsys, and Giantec Semiconductor, registered losses exceeding 5%, indicating a pervasive negative sentiment among investors.

Potential Drivers Behind the Market Move

This sector-wide correction did not occur in a vacuum. Market observers suggest a confluence of factors may be at play. The ongoing cyclical inventory adjustment within the global semiconductor industry persists, while the recovery in end-demand for consumer electronics remains weaker and slower than anticipated, casting uncertainty over memory pricing and corporate profitability. Simultaneously, a near-term decline in market risk appetite has triggered capital outflows from previously high-flying tech segments, amplifying volatility.

The synchronized decline across the supply chain—from design and manufacturing to application—reflects broader market concerns about the near-term health of the entire memory chip ecosystem. Restoring confidence typically requires time and tangible improvements in fundamental industry data.