Today (July 7th), the US stock market—especially the tech-heavy Nasdaq index—suffered a heavy setback. The core trigger stemmed from "Sell the News" panic in the semiconductor sector, compounded by the resonance of macroeconomic data and geopolitical risks.

The main reasons can be summarized into the following three points:

1. Core Trigger: Samsung's "Explosive" Earnings Report Sparks an AI Valuation Slump (Good News Exhausted)

Global semiconductor and AI chip stocks faced intense selling pressure today. In the Asia-Pacific session, Samsung Electronics announced exceptionally strong preliminary Q2 results, with operating profits surging 19-fold year-on-year (reaching 89.4 trillion won).

The Market's Inverse Reaction: Such stunning earnings not only failed to ignite the market but triggered a frenzied exodus of profit-taking. The South Korean stock market (KOSPI) plunged by up to 8% intraday, triggering a circuit breaker. Samsung itself closed down 7.7%, and SK Hynix fell sharply by 6.7%.

US Tech Stocks Under Consequent Pressure: This phenomenon directly triggered a "Reality Check" panic among US stock investors. The market began to seriously question: Can the extremely high valuations given by current tech giants and the hundreds of billions in real money invested in AI chips and data centers ultimately be translated into matching actual productivity and profit returns? This concern about an "AI bubble" directly led to a bloodbath across chip stocks and high-flying tech stocks.

2. Macro Data: US May Trade Deficit Soars Significantly

In the early session, the US Bureau of Economic Analysis (BEA) released the latest international trade data, directly pouring cold water on rate cut expectations and economic prospects:

The US goods and services trade deficit for May surged 42.2% month-on-month, reaching $77.6 billion (with the goods deficit widening to $106.5 billion).

Export Decline and Tariff Front-loading: May exports fell 3.2% month-on-month, reflecting weakening global core demand; imports rose 3.3%, partly due to some companies accelerating "front-loading" in anticipation of tariff policies. The massive trade deficit directly dragged down Q2 GDP growth expectations, intensifying market concerns about stagflation risks in the second half of the year.

Geopolitics: Tankers Attacked Again in the Strait of Hormuz, VIX Risk Aversion Rises

Renewed geopolitical tensions put further pressure on risk assets. News this morning reported that two commercial ships were attacked by unidentified projectiles while exiting the Strait of Hormuz.

Energy and Supply Chain Turbulence: Affected by the attacks, WTI and Brent crude oil rose in the short term, with Brent returning to around $73. Although not triggering a full-blown surge, frequent attacks on shipping lanes cut off market optimism, with funds beginning to flow out of high-beta tech stocks and into defensive assets.

Technical Review

The Nasdaq fell over 1.4% intraday today, and the S&P 500 broke below the 7,500-point mark. From a technical perspective, the US market in the past few sessions had been forcibly pulled near historical highs by a few heavyweight stocks (the Dow Jones hit a record high yesterday), inherently carrying risks of severe index dullness and extremely poor breadth. The Samsung earnings report merely provided an outlet for emotional venting, with the market using the opportunity for high-level consolidation. The short-term key is to see whether the Nasdaq can find support at key moving averages in the coming days.