#股票交易分享挑战 U.S. stocks recap: All three major indexes fell, while memory stocks rose!
All three major U.S. stock indexes fell
I. Closing performance of the three major indexes
- Dow Jones Industrial Average: closed at 53460 points, down 0.51%, hitting a new low for nearly two weeks
- S&P 500 Index: closed at 7747 points, down 0.52%
- Nasdaq Composite Index: closed at 26647 points, down 0.32%; semiconductor and memory sectors offset the decline, resulting in a significantly smaller drop than the Dow and S&P
II. Key drivers behind the market decline
1. Rising geopolitical tensions in the Middle East pushed up inflation and U.S. Treasury yields
The window for U.S.-Iran talks expired, with dim prospects for negotiations on a long-term agreement, while shipping through the Strait of Hormuz plunged sharply; the market worried that shrinking crude oil supply would push up inflation, prompting funds to sell U.S. Treasuries for safety. The 30-year U.S. Treasury yield rose to its highest level since 2007, while the 10-year yield climbed 5 basis points to 4.68%; high interest rates pressured growth-stock valuations, weighing on the broader market. International oil prices surged, with WTI hitting a new high for the month and Brent holding above $90, further reinforcing inflation concerns.
2. Earlier rate-cut expectations temporarily cooled
The market had previously bet that the Federal Reserve would begin cutting rates in September, but after U.S. Treasury yields rose, investors reassessed the risk of an inflation rebound caused by high oil prices. Rate-cut trades saw profit-taking, triggering a broad pullback in the market at high levels.3. Profit-taking in indexes at elevated levels
The three major indexes had previously advanced steadily and approached record highs, accumulating substantial unrealized gains, while geopolitical risks prompted investors to lock in profits.
III. Sharp sector divergence: Chip and semiconductor stocks rose against the trend, while major technology leaders broadly fell
1) Biggest decliners: The seven technology giants (AI core heavyweights collectively weakened)
Meta led large-cap technology stocks, plunging 3.5%; Microsoft fell more than 3%; Apple, Google, Amazon, Tesla, and Nvidia all closed slightly lower.
Differences among investors emerged: the market worried whether AI companies’ continued massive capital expenditures could sustainably translate into revenue returns, prompting funds to flow out of high-valuation internet and software leaders.
2) Surging against the trend: Memory chips, optical communications, and AI hardware all exploded higher
The Philadelphia Semiconductor Index surged 1.6%, returning to bull-market territory and becoming the only strong theme across the market. The core logic: OpenAI’s long-term computing-power procurement commitments have continued to restore expectations for AI hardware demand.
- Memory chips: SanDisk +9%, Western Digital +5%, Micron Technology +4%, Kioxia ADR surged more than 14%
- Optical communications: Coherent nearly 8%, Lumentum +4.6%, Corning +4%
- AI chipmakers: Cerebras surged 15%, announcing that it would provide hardware for OpenAI’s next-generation GPT computing power; Broadcom rose more than 5.8%; Palantir rose 8.47%
3) Other sectors
The communications services sector ranked last overall; industrials were relatively resilient; value-oriented financial and consumer stocks weakened in tandem.
IV. Moves in popular individual stocks
Gainers
1. SPCX (SpaceX): rebounded 4.5% as institutions raised their price targets
2. MSTR (MicroStrategy): +7.19%, with Bitcoin breaking above $64k and lifting crypto-related stocks
3. Soluna (SLNH): +12.34%, with crypto-mining computing power benefiting from rising coin prices
Decliners
1. CVNA (Carvana): the biggest decliner among S&P 500 components, plunging 7.3%
2. BRK.B (Berkshire Hathaway): down 1.23%, as rate-cut expectations reduced the appeal of high-cash-value stocks
V. Chinese concept stocks
Significant divergence:
- Gainers: NIO and Li Auto rose more than 1%
- Decliners: MINISO plunged 8%, while JD.com weakened slightly by more than 1%
VI. Movements across other major asset classes
1. Gold: rose 0.8% to a new two-month high as geopolitical safe-haven buying entered the market
2. U.S. Dollar Index: fell for three consecutive sessions, touching a two-month low intraday; offshore yuan broke above 6.74 intraday, reaching a new three-year high
3. Cryptocurrencies: Bitcoin rose above $64k intraday, with a 3% daily trading range
VII. Market focuses for the coming period
1. U.S. August PPI inflation data (released on August 18), which will directly affect judgments on the Federal Reserve’s rate-cut pace;
2. A dense schedule of retail-company earnings reports this week, testing the resilience of U.S. consumer spending;
3. Developments in the Middle East and the sustainability of crude oil supply; persistently rising oil prices could limit the Federal Reserve’s room for easing. $NVDA ‌

#我的七夕交易分享 U.S. stocks retreat! Storage and optical communications surge against the trend, with SanDisk jumping over 8%
Overnight, U.S. stocks broadly fluctuated lower, with market sentiment cautious and most sectors adjusting along with the broader market. Amid the overall weakness, structural opportunities stood out: the two major AI hardware segments of storage and optical communications bucked the trend and strengthened, charting independent rallies. SanDisk jumped over 8% in a single day, becoming a standout focus of the session. 
As the overall market adjusted and individual stocks diverged significantly, core capital began withdrawing from sectors facing uncertainty and flowing back into technology hardware supply chains with solid fundamentals and clear demand. Storage and optical communications are precisely the indispensable core infrastructure of today’s computing-power industry.
 As artificial intelligence technology continues to evolve, demand for large-model training, cloud computing-power scheduling, and the storage and transmission of massive amounts of data continues to expand. The ongoing construction of AI servers and data centers is steadily driving demand for high-end storage and high-speed optical modules. Combined with the gradual reduction of industry inventories and optimized production-capacity schedules, the supply-demand balance in the storage industry continues to improve, and industry sentiment continues to recover.
 Meanwhile, demand across the optical communications industry chain remains strong. Data interaction within AI computing-power clusters relies heavily on high-speed optical transmission equipment and optical chips. Major cloud providers continue to expand their computing centers, generating ample orders for the upstream industry chain. Industry fundamentals are steadily improving, supporting the sector’s countertrend rally. 
The strength of the storage and optical communications sectors in this round is not the result of short-term concept speculation, but rather a healthy recovery driven by the continued materialization of industrial demand. In a volatile market environment, capital favors technology sectors with greater certainty and solid fundamentals, which is the core reason these two sectors have been able to break out against the trend. 
Overall, the global wave of computing-power construction continues to advance. The upstream and downstream AI hardware industry chains still have a stable foundation for industrial development, and the sector’s long-term growth logic remains clear.$MU ‌

#我的七夕交易分享 Korean Stocks Live | South Korea's KOSPI Continues to Surge, Up 2.81%; Semiconductors Explode Again as Memory Stocks Continue to Heat Up
The Asia-Pacific market continued to display clear structural moves in early trading, with South Korea's KOSPI index climbing further to 7173.84, up 2.81%. It opened at 7127.77 today, reached an intraday high of 7173.84 and a low of 7102.65, and generally maintained a strong upward trend throughout the session.
South Korea's semiconductor heavyweight stocks collectively rallied, with the memory sector serving as the core driver of this round of gains.
Looking at the overnight U.S. market close alongside the Asia-Pacific morning session, signals from global hardware and semiconductors have become highly consistent. All three major U.S. stock indexes closed lower overnight, and the overall market mood was weak, but memory chips, optical communications, and semiconductor equipment followed independent upward trends. SanDisk, Micron, and SK hynix all rose, while optical module and equipment stocks also strengthened sharply. Capital did not exit across the board, but instead concentrated on the main theme of the memory cycle bottoming out and recovering. South Korea's stock market itself has a high weighting in semiconductors, and memory giants such as Samsung have a major impact on the index.
The profitable performance of overseas hardware sectors overnight directly carried over into the Asia-Pacific morning session, driving the KOSPI sharply higher and further strengthening overseas funds' expectations of a turning point in the memory industry. This strong performance in overseas markets will directly carry over into the A-share opening, providing a sentiment boost to domestic memory chip, optical communications, and semiconductor equipment sectors. However, it is essential to distinguish between the two: strong gains overseas are a sentiment catalyst, not a guarantee that A-shares will rise in tandem. Historically, there have been many instances in which overseas semiconductors surged, related A-share sectors opened sharply higher, and then in-market funds used the positive news to take profits, resulting in a high open followed by a decline. Therefore, one should not become overly optimistic simply because overseas markets are booming.
In practical terms, focus on two key points:
First, watch the extent of the higher open. If the opening gain is substantial, remain highly alert to profit-taking pressure;
Second, watch trading volume after the open. Only if the higher open is supported by increased volume will the sector have a foundation for further gains; if prices surge sharply but trading volume fails to keep up, be wary of short-term funds taking profits.
At the broader market level, U.S. stocks closed lower overall overnight, and the external market environment is not particularly favorable. Today's A-share market is more likely to offer structural opportunities, so expectations for a broad-based rally should be kept in check. Opportunities are mainly concentrated within the semiconductor hardware theme, and differentiation will also emerge within the sector. Memory and optical components have greater elasticity, followed by equipment, while some heavyweight equipment and communications equipment stocks will experience relatively milder volatility.
Overall, expectations for the overseas cycle are continuing to heat up, but A-shares' own positioning structure and the willingness of in-market funds are the core factors determining how far the market can go. Overseas strength can serve only as a catalyst, not as the sole basis for buying.
Can the semiconductor sector ride the tailwinds from overseas markets today and produce an independent rally? Feel free to share your views in the comments.
Market information is for reference only and does not constitute investment advice.$Samsung Electronics ‌