The domestic stock market experienced a broad-based selloff on August 19, with all three major indices opening lower and extending losses throughout the session. By the closing bell, the Shanghai Composite Index had fallen 2.4%, the Shenzhen Component Index dropped 5.01%, and the ChiNext Index tumbled 6.26%.
Sector performance was mixed, with coal stocks showing relative strength against the downturn, while chemical and real estate names saw notable upticks. Banking and agricultural sectors also demonstrated resilience. On the downside, high-flying momentum stocks suffered a sharp pullback, and humanoid robot concept shares weakened considerably. More than 5,000 stocks closed in negative territory, with over 100 names hitting the daily downside limit. Total trading volume across the Shanghai and Shenzhen exchanges reached 2.51 trillion yuan, up 110.3 billion yuan from the previous session.
Given the overnight weakness in US equities and the lower openings in Japanese and South Korean markets this morning, some degree of decline in the A-share market was widely anticipated. However, the lack of any meaningful buying support and the relentless one-way slide that culminated in the steepest single-day loss for August caught many investors off guard.
With trading volume expanding by only around 110 billion yuan compared to Tuesday, the sentiment appears to be more confusion than panic. It seems that large institutional funds with potential bargain-hunting intentions have yet to make their move decisively. Today's review will focus on two key questions: what triggered the selloff, and how should investors approach tomorrow?
Looking at external factors, the Asia-Pacific equity markets that had previously rebounded in tandem have now fallen back into a synchronized correction. Several technology-heavy indices across different markets have followed a similar trajectory since late July, all experiencing gap-down openings in their most recent sessions. Analysts point to a common catalyst: the release of the Federal Reserve's July monetary policy meeting minutes, scheduled for 2:00 AM Beijing time Thursday. This will mark the second set of minutes published under the leadership of newly appointed Fed Chair Kevin Warsh.
Reports indicate that a wave of selling in the US Treasury market has intensified concerns about stretched valuations in technology stocks. The 30-year Treasury yield briefly surged to 5.32% on Tuesday, its highest level since June 2007, while the 10-year yield touched 4.75%, the highest since January 2025. Yields eventually retreated, with the 10-year closing at 4.706% and the 30-year at 5.2858%. Against this backdrop of escalating Treasury market turbulence and Warsh's reduced public communication, the upcoming minutes have taken on heightened significance. Investors are seeking clarity on the future trajectory of US interest rates.
Another headwind stems from the situation in the Strait of Hormuz, although market participants appear to have grown largely desensitized to it. Former President Trump posted an image on social media claiming the strait as US territory, a statement quickly dismissed by Iranian officials as delusional. Adding to the short-term sentiment pressure, two of the market's highest-profile consecutive-limit-up stocks, Ailiju and Yiming Food, issued risk warnings yesterday evening, stating they might request trading halts for review if share prices continue to surge. This development further dampened speculative enthusiasm among high-level momentum traders.
The data confirms the deteriorating sentiment: the number of limit-down stocks surpassed limit-up names by morning, and by afternoon the tally had climbed to 143, marking what can be described as the first "cold snap" in market emotion. For investors still holding positions after today's decline, the question of how to respond tomorrow has become paramount. Those who sold during the afternoon session's deep losses, those planning to liquidate entirely tomorrow, and those waiting on the sidelines to enter are essentially taking a bearish stance, believing either that the rebound since late July has concluded or that the market must retest previous lows before stabilizing.
For investors inclined to remain bullish, tomorrow presents a critical juncture. Beyond monitoring the external developments mentioned earlier, two domestic factors warrant close attention. First, as noted in previous analyses, the area around the 3,884-point level on the Shanghai Composite Index represents the upper boundary of the bottom consolidation range from late July to early August. Since August 6, the index has held above this level, and today's afternoon dip to a low of 3,879.58 points before bouncing back suggests the former resistance zone is now functioning as support. However, with tomorrow being a typical cash-out day and Friday marking the index futures delivery date, this support level is likely to face repeated testing.
Second, historical patterns in the A-share market offer some guidance. A general rule of thumb has emerged: after a sharp decline, the next trading day often sees a dip followed by a recovery. Analysis of four major indices, including the Wind All-A-share Index, Shanghai Composite, ChiNext, and STAR 50, reveals a relatively high probability of such rebound behavior following significant selloffs this year. It's important to note, however, that a high probability of recovery does not guarantee that tomorrow will bring gains, and investors should remain adaptable and responsive to intraday developments.
Comments