Samsung Electronics July 21 Surge: KRW 972.4 Billion of Buying—Was KRW 240,000 the Bottom?

The Samsung Electronics July 21 surge was more than a mechanical rebound in the KOSPI. Samsung Electronics closed the regular KRX session at KRW 259,000, up 6.15%, while foreign and domestic institutional investors purchased a combined KRW 972.4 billion of shares.

According to the brokerage-market data confirmed by the user, Samsung Electronics also finished the NXT after-market session above its KRX close. The exact NXT closing price could not be independently verified through publicly searchable data, so this report does not publish an unconfirmed number.

The session provided credible evidence of demand near KRW 240,000, but it did not confirm the end of the broader downtrend.

The stock reached KRW 263,500 intraday but remains below its 10-day and 20-day moving averages. KRW 240,000 has become a plausible short-term bottom candidate, while a sustained breakout above KRW 263,500 and KRW 270,000 is still required.

Samsung Electronics July 21 Surge: Trading Snapshot

At an indicative exchange rate near KRW 1,479 per U.S. dollar, the closing price was approximately US$175 per share. Combined foreign and institutional net buying was equivalent to roughly US$658 million.

The stock outperformed the KOSPI by 2.59 percentage points, demonstrating that the move was supported by company-specific demand as well as the broader market recovery.

Why Foreign and Institutional Investors Bought KRW 972.4 Billion

Semiconductor exports remained exceptionally strong

South Korea’s exports during the first 20 days of July increased 52.3% year over year. Semiconductor exports rose 180.6% to US$22.1 billion, the highest level recorded for the period.

The data challenged the view that the memory cycle was already deteriorating.

The market reconsidered the impact of lower-cost AI models

The introduction of lower-cost Chinese AI models had raised concerns that hyperscalers might reduce infrastructure spending.

Investors also considered the opposite possibility: cheaper AI services may attract substantially more users and inference requests, increasing aggregate demand for servers and memory.

This helped reverse part of the previous session’s aggressive AI-memory selloff.

The preceding decline had become extreme

Samsung Electronics fell from KRW 353,500 on June 22 to KRW 244,000 on July 20, a decline of approximately 31% in less than one month.

The magnitude and speed of the decline suggested that deleveraging and sentiment had moved faster than underlying earnings expectations.

Demand Appeared Near KRW 243,000

The stock opened at KRW 247,000 and briefly fell to KRW 243,000 before rallying to KRW 263,500.

• Close above the intraday low: approximately 6.58%
• Close above the open: approximately 4.86%
• Close below the intraday high: approximately 1.71%
• Closing position within the daily range: approximately the top 22%

The close near the upper end of the daily range indicates that buying pressure largely remained in place through the end of the KRX session.

How to Interpret the NXT Advance

The user-confirmed NXT data showed that Samsung Electronics remained above the regular-session close after the KRX market ended.

This suggests that the semiconductor rebound did not immediately reverse during after-market trading.

However, NXT liquidity can differ from KRX liquidity, and an NXT price does not guarantee the next regular-session opening price.

The after-market advance should therefore be treated as a supportive sentiment indicator rather than confirmation of a new uptrend.

Daily Moving Averages Still Show Resistance

The stock is immediately below its five-day average but remains materially below the 10-day and 20-day averages.

A KRX close above approximately KRW 260,000 would be the first sign of short-term stabilization. A recovery above KRW 279,500 to KRW 285,000 would be required for a more meaningful trend improvement.

Volume Was Below the Recent Average

The 20-session average volume was approximately 30.94 million shares.

July 21 volume was 20.33 million shares, approximately 34% below that average.

The lower volume may indicate that selling pressure had eased, but it also means the rally was not supported by exceptional broad-market accumulation.

A breakout above KRW 263,500 and KRW 270,000 would carry greater credibility if volume expanded toward or above 30 million shares.

Brokerage Expectations Remain Far Above the Market Price

KB Securities maintained a Buy rating and a KRW 600,000 target price on July 13.

The brokerage expects unusually tight memory supply in 2027, supported by limited capacity additions and continued investment by global technology companies.

The target is approximately 132% above the July 21 close.

It is not a guaranteed future value. Delays in HBM customer qualification, slower memory pricing, continued foundry losses or reduced AI infrastructure spending could lower earnings estimates and valuation multiples.

Key Support Levels

First Support: KRW 255,000–259,000

KRW 259,000 was the July 21 close, while KRW 255,000 was the July 16 close.

Critical Support: KRW 243,000–244,000

The July 21 low was KRW 243,000 and the previous close was KRW 244,000.

This is the first zone where strong demand was directly observed.

Bottoming Thesis Invalidation: KRW 240,000

KRW 240,000 was the July 20 intraday low.

A high-volume close below this level would invalidate the immediate bottoming thesis.

Key Resistance Levels

First Resistance: KRW 260,000–263,500

The five-day average is near KRW 260,100, while the July 21 intraday high was KRW 263,500.

Second Resistance: KRW 269,000–270,000

The 10-day moving average is approximately KRW 269,150.

Major Resistance: KRW 279,500–285,000

This zone includes recent closing prices and separates a short-term oversold rebound from a more meaningful trend recovery.

Three Scenarios

Bull Case

The stock holds KRW 259,000 and closes above KRW 263,500.

Continued foreign and institutional buying, combined with higher volume, could extend the rebound toward KRW 269,000–270,000 and then KRW 279,500.

Base Case

The shares remain volatile between KRW 244,000 and KRW 263,500.

Bargain buying near support is repeatedly offset by profit-taking near resistance.

This currently appears to be the most plausible near-term scenario.

Bear Case

The stock loses KRW 255,000 and then falls below KRW 243,000–244,000.

The market would likely retest KRW 240,000. A high-volume break below that level would weaken the case that July 20 marked the short-term low.

Invalidation Conditions

The short-term rebound thesis would weaken if Samsung Electronics closed below KRW 244,000 and foreign and institutional flows reversed to simultaneous net selling.

The bottoming thesis would be invalidated by a volume-backed close below KRW 240,000.

The medium-term bearish interpretation would weaken if the shares recovered KRW 270,000 and then established support between KRW 279,500 and KRW 285,000.

Upcoming Catalysts

• Whether the next KRX session holds above KRW 259,000
• A breakout above KRW 263,500
• Continuation of foreign and institutional net buying
• South Korean semiconductor export data
• Galaxy Unpacked 2026 on July 22 at 10:00 p.m. KST
• Second-quarter earnings call on July 30 at 10:00 a.m. KST
• Management commentary on HBM customer qualification
• Foundry utilization and loss reduction

Related Korean Market Analysis

For the market conditions immediately preceding the Samsung Electronics rebound, see:

KOSPI Holds 6,500 by a Thread: Why the Intraday Rebound Failed

Bottom Line

Samsung Electronics rose 6.15%, while foreign and domestic institutions purchased a combined KRW 972.4 billion.

Demand appeared near KRW 243,000, the stock closed near the upper end of its daily range, and user-confirmed NXT data showed additional after-market strength.

However, volume remained 34% below the 20-session average and the stock has not yet cleared its key moving averages.

• First support: KRW 255,000–259,000
• Critical support: KRW 243,000–244,000
• Bottoming thesis invalidation: Below KRW 240,000
• First breakout: KRW 260,000–263,500
• Trend improvement confirmation: KRW 279,500–285,000

KRW 240,000 has become a credible short-term bottom candidate. Confirmation still requires a volume-supported breakout above KRW 263,500 and KRW 270,000.

Sources

• Investing.com: Samsung Electronics KRX daily OHLCV data
• Yonhap News Agency: Semiconductor rebound and Korean market flows
• Yonhap and Daum: Samsung Electronics foreign and institutional net buying
• KB Securities: KRW 600,000 target and memory supply outlook
• Samsung Newsroom: Galaxy Unpacked July 2026
• Samsung Electronics IR: Second-quarter earnings schedule

AI and Investment-Risk Disclosure

This report was prepared with AI assistance using publicly available KRX data, user-confirmed NXT market direction, official company information and brokerage research.

The exact NXT closing price could not be independently verified and is therefore not published.

Moving averages, average volume and percentage changes were independently recalculated from the cited KRX price series.

Technical analysis is probabilistic and does not guarantee future performance. Brokerage target prices depend on specific earnings and valuation assumptions and do not represent guaranteed future prices.

This material is for informational purposes only and does not constitute a recommendation to buy, sell or hold Samsung Electronics shares or any other financial product.