On August 5th, Eastern Time (August 6th, Beijing Time), US stocks presented a bifurcated market characterized by both "ice and fire" after several consecutive days of significant gains: the Dow Jones Industrial Average rose by 0.5% against the trend, closing at 54349.12 points, setting a new record close; the S&P 500 briefly touched an intraday all-time high of 7793 points but subsequently lost all gains, closing down 0.2% at 7723.55 points; the Nasdaq Composite fell by 0.8% due to the drag from weighted technology stocks, closing at 26363.44 points, and the Nasdaq 100 fell by 0.8% to 29487.79 points, while the Russell 2000 also declined by 0.6%. Sell-the-news: AI leaders experience collective pullback The previous trading day (August 4th), US stocks witnessed a strong rally—the Dow broke the 54,000 mark for the first time in history, the S&P 500 reached 7,700 for the first time, and all three indices set new highs. However, just one trading day later, the market's trading logic switched from "positive news driving" to "sell-the-news." Matt Maley, Chief Market Strategist at Miller Tabak, pointed out that the market was digesting the previous large gains, and the stock prices of AMD and SpaceX fell after reporting impressive results, leading investors to worry about the re-emergence of "selling the facts." Alphabet: Strategic concerns arise from AI talent departure The largest weight factor dragging the Nasdaq on the day was Google's parent company, Alphabet, whose stock fell by 4%. According to The Wall Street Journal, Jeff Dean, one of Google's earliest employees and the core architect of the company's AI strategy for the past 15 years, announced his resignation to found an AI startup focused on scientific discovery, taking several core engineers with him; meanwhile, Demis Hassabis, head of DeepMind, transitioned to chair of the lab. The market is concerned that the loss of core technical personnel may affect Google's pace in the generative AI race, compounded by the massive capital expenditures disclosed in previous financial reports, causing investors to reprice Alphabet's "AI story." SpaceX and AMD: Stock sold despite exceeding expectations SpaceX's stock plummeted nearly 14%, even though the company's Q2 revenue reached $7.8 billion, a 92% year-over-year increase and far exceeding expectations, but capital expenditures during the same period were as high as $18.4 billion, with $15.8 billion invested in AI computing power and cloud infrastructure, making the high "burn rate" a point of attention for the market; more critically, after the financial report, the company faced the unlocking of approximately 910 million shares, exceeding the current free float, and supply pressure from these shares is almost certain to suppress the short-term stock price. AMD also fell by 7% the day after its earnings report—Q2 revenue was $11.54 billion, a record high with a 50% year-over-year increase, data center revenue was $6.72 billion, a year-over-year increase of 107%, and the Q3 guidance was above market consensus, yet it still failed to meet the "high expectations" inflated by the AI narrative. Semiconductor strength returns: A recovery after the July crash It is worth noting that in contrast to profit-taking in AI weight stocks, the semiconductor sector continued a strong rebound. The Philadelphia Semiconductor Index rose by 6.5% in a single day on August 4th, marking its fourth consecutive day of increase, and has cumulatively rebounded by about 15% from the low on July 29th. ARM surged by over 17%, Coherent and Marvell Technology rose by over 12%, Intel and Seagate surged by over 10%, and Micron Technology rose by over 7%. Previously, the index had plummeted by 20.6% in July, triggering market panic over the "AI bubble," but now capital is flowing back into the storage and computing chains. Institutions like Goldman Sachs believe that the industry trend of continuous expansion of AI capital expenditure has not changed, but market volatility has significantly increased, leading to more intense stock differentiation. Macro Variables: Oil Price Plunge and Federal Reserve Path Game A major macroeconomic driver of this round of market activity is the easing of geopolitical risks in the Middle East. Negotiations between the US and Iran have resumed, and Iran and Oman have reached an agreement on a proposed shipping route through the Strait of Hormuz. Market expectations are that global oil supply will return to normal, causing international oil prices to drop sharply by 6%, with ICE Brent crude falling below $80/barrel and WTI crude falling below $76/barrel. The decline in oil prices has directly alleviated market concerns about energy inflation, providing support for stock valuations. At the same time, US economic data remains robust: the July services PMI shows that commercial activity remains expanding, with accelerating new order growth, and the business activity indicator rising to a five-month high. However, inflationary pressures have not completely dissipated—the President of the Minneapolis Fed, Kashkari, stated that the Federal Reserve should begin gradual interest rate hikes immediately to curb persistently high inflation. CME's "Fed Watch" data shows that the market anticipates a 58.4% probability of a 25 basis point hike at the September meeting, with a 41.6% probability of no change, indicating a significant increase in policy path uncertainty, which is an important variable for US stock valuations in the second half of the year. Implications for Vietnamese Investors: Exchange Rates, Oil Prices, and Allocation Strategies Dollar and Vietnamese Dong: With increasing divergence in the Federal Reserve's policy path, fluctuations in the Dollar Index will directly affect the VND/USD exchange rate. If the Federal Reserve unexpectedly hikes interest rates, a stronger dollar may put downward pressure on the Vietnamese Dong in the short term; conversely, if interest rate hike expectations cool down, a weaker dollar benefits the stability of the Vietnamese Dong and foreign capital inflow. When Vietnamese investors allocate to US stocks, they must incorporate exchange rate costs into the overall return consideration and reasonably utilize hedging tools to hedge currency risks. Dual Dividend from Oil Price Decline: Vietnam is a net oil importer, so the decline in international oil prices directly reduces domestic energy costs and inflationary pressures, benefiting the purchasing power of the Vietnamese Dong and corporate profits, and potentially providing the State Bank of Vietnam with more flexible monetary policy space. This logic resonates with the decrease in energy costs in US stocks, creating a dual positive transmission to the Vietnamese and US stock markets. Pacing of AI Market Participation: The core of this round of US stock market activity remains the AI industry trend, but cases like Alphabet, SpaceX, and AMD show that exceeding expectations is no longer enough to support stock prices; valuation and share structure are equally important. Event risks such as lock-up expirations and personnel changes require investors to pay more attention to diversified allocation and avoid excessive concentration in a single AI leader.

Cross-border portfolio positioning: The market capitalization of the S&P 500 has increased by approximately $2.1 trillion since August, reaching a record high of $70.5 trillion, indicating significant short-term gains. For Vietnamese investors, while the index is setting new highs, it is advisable to build positions in tranches and look for opportunities during pullbacks, while also monitoring small-cap indices like the Russell 2000 for catch-up potential to balance portfolio risk.

Conclusion: Offensive and Defensive Strategies in a Structural Market

Overall, the US stock market in early August is in a structural phase characterized by "index highs and stock divergence": the Dow has set new highs driven by traditional blue chips and favorable oil prices, while the AI sector has completed a reshuffling amid intense volatility. For Vietnamese investors, it is necessary to recognize the long-term allocation value brought by the AI industry trend while also acknowledging short-term volatility and event risks. Maintaining portfolio balance, controlling currency exposure, and allocating to high-quality assets in tranches are the more prudent choices in this current market characterized by "both highs and pullbacks," before the Federal Reserve's policy path becomes clear. The market always rewards patience—regardless of how the trend unfolds, disciplined asset allocation remains the key to navigating volatility.