Nasdaq Falls as China Memory Advances Pressure Chip Stocks

U.S. technology stocks came under renewed pressure Tuesday, October 13, 2026, as investors sold semiconductor and memory-related shares following developments in China's memory chip industry and warnings about elevated artificial intelligence investment expectations. The Nasdaq Composite dropped approximately 0.4% at the opening bell, while the S&P 500 slipped just 0.02%, according to Share Talk.

The diverging performance highlighted the concentration of selling in technology stocks rather than a broad retreat from U.S. equities. Nvidia and AMD faced continued pressure, while memory-related companies Seagate and Western Digital recorded additional declines, according to reports from Share Talk and StockStory.

StockStory reported that Seagate shares fell 4.5% and Western Digital shares dropped 4.7% during morning trading. The declines followed the previous session's losses and reflected investor concerns about whether anticipated advances in memory production could ease supply constraints sooner than expected.

ChangXin Memory Technologies announced plans to release 4F-square DDR5 server modules by late 2026, according to information reported by Bloomberg and cited by StockStory. The planned technology would increase memory density by one-third, potentially changing expectations for the availability of memory used in artificial intelligence servers.

StockStory, citing Investing.com, reported that the Chinese company's timeline was approximately two years ahead of Samsung's roadmap. That comparison prompted investors to reassess forecasts for tight memory supplies, which have supported expectations for continued demand across the artificial intelligence infrastructure sector.

Beyond technological competition, concerns about investment spending and market valuations also weighed on semiconductor shares. Investors have increasingly questioned whether the rapid expansion of artificial intelligence infrastructure can sustain the expectations reflected in highly valued technology stocks, according to Share Talk.

Broadcom Chief Executive Hock Tan also expressed concern about investor expectations for artificial intelligence investments during an interview at an event in Singapore, as reported by Reuters.

"A lot of investors have no clue what they're investing in, but set very extreme expectations, only to find out that it's almost like they are in a casino gambling," said Hock Tan, Broadcom's chief executive.

Tan's remarks added to concerns surrounding semiconductor and memory manufacturers as investors reassessed the potential returns from artificial intelligence spending. The industry faces pressure from both expectations of greater competition and uncertainty about the pace of future infrastructure investment.

Western Digital's longer-term share performance remained substantially positive despite the latest decline. StockStory reported that the stock had gained 97.5% since the beginning of 2026 and traded at $370.61, approximately 50.3% below its 52-week high of $746.23, reached in June 2026.

StockStory also noted that Western Digital had experienced 77 share-price movements exceeding 5% over the previous year. The latest decline followed an earlier 3.4% drop reported 15 days before the article, when concerns about near-term hardware demand emerged after OpenAI paused training of its frontier artificial intelligence models following a security breach.

Despite the semiconductor sell-off, the S&P 500's near-flat opening indicated that losses remained concentrated in technology and memory-related shares during early trading. Investors continued to monitor whether the weakness would remain confined to semiconductor manufacturers or extend across the broader artificial intelligence and technology sectors.