Key Takeaways
- Taiwan’s TAIEX index plunged 4.65% (2,030 points), marking its third-largest single-day loss on record as a global semiconductor selloff intensified.
- Sony Semiconductor (SONY) halted operations at its Kumamoto facility following a powerful 6.8 magnitude earthquake in southern Japan, raising concerns over image sensor supply chains.
- OpenAI’s ChatGPT is nearing 1 billion weekly active users, significantly ahead of previous industry expectations and cementing its lead in the generative AI market.
- U.S. and Saudi forces launched joint precision strikes against Iran-aligned militia positions in Iraq following a series of drone attacks on energy infrastructure.
- The PBOC maintained its overnight reverse repo rate at 1.25%, injecting 600 billion yuan into the banking system to stabilize short-term liquidity.
Taiwan Market Rout and Semiconductor Volatility
Taiwan’s benchmark TAIEX index suffered a historic collapse on Wednesday, dropping 2,030.83 points to close at 41,603.36. The 4.65% decline was driven by a massive retreat from technology heavyweights, with Taiwan Semiconductor Manufacturing Co. (TSMC) (TSM) falling 2.98% and shedding over NT$2 trillion in market capitalization. Other major players, including MediaTek (2454) and Delta Electronics (2308), hit their daily downward limits as investors reacted to cooling AI sentiment and broader macroeconomic uncertainty.
Japan Earthquake Disrupts Sony Production
A major 6.8 magnitude earthquake struck Japan’s Kumamoto prefecture on Tuesday, forcing Sony Semiconductor Manufacturing to suspend operations at its primary technology center. While no fatalities were reported among staff, the facility remains offline as engineers conduct safety inspections of sensitive manufacturing lines. The region is a critical hub for global semiconductor production; notably, TSMC (TSM) also evacuated its nearby JASM plant, though early reports indicate no significant structural damage to its facilities.
OpenAI Approaches Massive User Milestone
According to reports from The Information, OpenAI’s ChatGPT is on the verge of reaching 1 billion weekly active users. This growth trajectory represents a doubling of its user base since early 2025, driven by the rollout of advanced reasoning models and expanded enterprise integrations. The milestone comes as OpenAI reportedly prepares for a potential public offering, with internal valuations nearing $1 trillion amid surging demand for generative AI tools.
Middle East Tensions Escalate with Joint Strikes
Geopolitical risks spiked as the U.S. military and Saudi Arabian Armed Forces conducted coordinated airstrikes against Popular Mobilization Forces (PMF) positions in eastern Iraq. The strikes were a direct response to more than 30 drone attacks launched over a 72-hour period targeting U.S. personnel and Saudi petroleum facilities. The Iraqi PMF reported multiple fatalities and accused foreign forces of violating national sovereignty, further straining regional stability ahead of planned diplomatic visits to Riyadh.
China Signals Stability with Liquidity Injection
The People’s Bank of China (PBOC) held its overnight reverse repo rate steady at 1.25% during its latest open market operation. The central bank injected 600 billion yuan ($88.58 billion) to manage month-end liquidity pressures and support the banking system. Simultaneously, China’s Ministry of Finance announced plans to sell 15 billion yuan in sovereign bonds in Hong Kong on August 5, part of a continuing strategy to expand its offshore yuan-denominated debt market.
Ed Liston is a senior contributing editor at TheStockMarketWatch.com. An active market watcher and investor, Ed guides an independent team of experienced analysts and writes for multiple stock trader publications.