The theme of this week's market trend is 'Large-cap stocks gained, while small and mid-cap stocks lagged.'

SK hynix was at the center of this week's stock radar. It was a surge unusual for a large-cap stock.

However, more important than the mere fact that its stock price rose significantly is the shift in how the market is valuing this company.

With High Bandwidth Memory (HBM) emerging as a bottleneck in the AI ecosystem, SK hynix is no longer a company that can be explained solely by traditional memory cycles.

This week's Stock Radar has one question.

Did the market buy semiconductors, or did it buy the bottleneck within semiconductors?

Three structures were identified in this week's stock trends.

First, SK hynix has become a symbol of the re-evaluation of the AI bottleneck industry.

In the past, memory semiconductors were considered commodity components whose prices fluctuated based on supply and demand. However, with the expansion of AI server investments, HBM has become not just a simple component, but critical infrastructure that determines computing performance and data processing speed. The market has begun to look at memory differently, viewing it not as a commodity but as a bottleneck asset.

Second, foreign selling and individual buying clashed head-on for Samsung Electronics and SK hynix.

According to data, foreign investors sold approximately 8 trillion won worth of stocks across the Korea Exchange and Nextrade (NXT), with a significant portion being large-cap semiconductor stocks like Samsung Electronics and SK hynix. However, the market did not collapse because individual funds absorbed these sales. This scene demonstrates the weakening of the old paradigm that explained the Korean market solely by foreign selling.

Third, KOSDAQ lagged relatively.

While large-cap semiconductor stocks in KOSPI attracted market attention and funds, small and mid-cap growth stocks were sidelined. Institutional funds shifted to large semiconductors and index-related sectors to defend their returns, and KOSDAQ, despite some buying from foreign investors, failed to gain momentum. Funds do not buy all stocks even in a bull market; this week's market reaffirmed that fact.

This week's stock trend was a market where large-cap semiconductor stocks led, individual liquidity absorbed selling, and KOSDAQ small and mid-cap stocks paid the price for the concentration on large caps.

Next week's checkpoints are threefold.

First, we need to determine whether the foreign selling of SK hynix and Samsung Electronics is for short-term profit-taking or the beginning of portfolio adjustments.

Second, we need to distinguish whether individual buying represents idle cash or margin financing.

Third, we need to see if institutional selling in KOSDAQ stops and funds return to small and mid-cap growth stocks.

※ This article is a reference analysis to help understand market trends and the content of the article, not investment advice. Actual market and stock prices may vary depending on variables such as oil prices, exchange rates, interest rates, corporate performance, supply and demand, and policy. The final investment decision rests with the investor.