[2026.05/04~05/08] Korea Stock Market Weekly Review | KOSPI Hits Record 7,498, Samsung Joins $1T Club
📊 This Week at a Glance
The first week of May 2026 (May 4 – May 8) on the Korean stock market closed with a sharply polarized tape: the KOSPI surged +10.54% while the KOSDAQ slipped -0.38%. The KOSPI rewrote its all-time high with an intraday record of 7,531.88 and finished at 7,498.00, just shy of the 7,500 line, while the KOSDAQ retreated from 1,212 to 1,207 amid heavy concentration into large-cap names. Note that May 5 (Children's Day) was a market holiday in Korea.
| Index | Weekly Open | Weekly High | Weekly Low | Weekly Close | Weekly Volume | Weekly Change |
|---|---|---|---|---|---|---|
| KOSPI | 6,782.93 | 7,531.88 | 6,741.63 | 7,498.00 | 315,925.3만 | +10.54% |
| KOSDAQ | 1,212.28 | 1,222.65 | 1,194.56 | 1,207.72 | 526,304.2만 | -0.38% |
The weekly USD/KRW close stood at 1,461.48, with the pair touching the high-1,470s during the week as the won extended its weakness. US markets remained constructive: S&P 500 +0.84%, Nasdaq +1.71%, and Dow +0.02% — providing a supportive global backdrop for Korea's tech and semiconductor names.
📅 Daily Performance
The KOSPI front-loaded its gains with two consecutive 5%+/6%+ surges that catapulted the index above 7,400, before profit-taking dampened momentum into Friday. The KOSDAQ, by contrast, weakened on three of four sessions after a strong open on Monday.
| Date | KOSPI Close | KOSPI % | KOSDAQ Close | KOSDAQ % |
|---|---|---|---|---|
| 5/4 (Mon) | 6,936.99 | +5.12% | 1,213.74 | +1.79% |
| 5/5 (Tue) | Closed — Children's Day Holiday | |||
| 5/6 (Wed) | 7,384.56 | +6.45% | 1,210.17 | -0.29% |
| 5/7 (Thu) | 7,490.05 | +1.43% | 1,199.18 | -0.91% |
| 5/8 (Fri) | 7,498.00 | +0.11% | 1,207.72 | +0.71% |
📈 KOSPI Weekly Analysis
The KOSPI rocketed 715.07 points from 6,782.93 to 7,498.00, posting an extraordinary +10.54% weekly gain. The benchmark briefly tagged 7,531.88 intraday for a fresh all-time high, and on May 6 a landmark milestone was set as Samsung Electronics joined the $1 trillion market-cap club, reshaping sentiment across the entire blue-chip complex.
The week's headline-grabbing moves came on Monday (+5.12%) and Wednesday (+6.45%). Export-cyclicals — auto parts, air freight/logistics, IT services, and autos — moved limit-up or recorded double-digit gains. Six KOSPI names hit the daily upper limit during the week: Gaon Cable, Hyundai AutoEver, Gyeyang Electric (and its preferred shares), Daewon Cable preferred, and Genexine.
Toward week's end, profit-taking trimmed the pace as Thursday closed +1.43% and Friday +0.11%, suggesting the market is now testing whether the 7,500 threshold can hold. Weekly turnover reached 3.16 billion shares (315,925.3만), confirming abundant liquidity behind the rally.
📉 KOSDAQ Weekly Analysis
The KOSDAQ slipped 4.56 points from 1,212.28 to 1,207.72 (-0.38%), in stark contrast to its big-cap counterpart. After opening the week strong on May 4 (+1.79%), the index fell on May 6 (-0.29%) and again on May 7 (-0.91%), threatening the 1,200 floor before a modest May 8 bounce (+0.71%) capped the week in negative territory.
The weekly high of 1,222.65 and low of 1,194.56 imply a narrow 28-point range — momentum was conspicuously absent versus the KOSPI. Stock-level dispersion, however, was alive and well: eight names — including Hanul Semiconductor, Sigetronics, Dawon Nexview (semiconductor materials/back-end) and InBody, Sena Technologies, Cosmax NBT (idiosyncratic catalysts) — hit the daily limit. Volume of 5.26 billion shares (526,304.2만) was robust, but index-level traction was clearly missing.
🔥 Weekly Themes & Sectors
The leading sectors for the week were Auto Parts (+7.75%) → Air Freight & Logistics (+7.42%) → IT Services (+7.24%) → Autos (+6.06%) → Electronics (+3.49%) → Venture Capital (+3.23%), a clean read on the export-cyclical and IT/semiconductor infrastructure leadership.
① Power Cables & Grid Infrastructure (Up)
Gaon Cable (limit-up +110,000 KRW to 477,000), Gyeyang Electric (limit-up +1,950), Gyeyang Electric Pref. (limit-up +2,400), and Daewon Cable Pref. (limit-up +5,010) all hit the upper price limit during the week. Persistent inflows reflected expectations for AI data-center build-out and grid investment. Affiliated names such as Hansol Technics (+1,730 KRW to 10,880) followed suit.
② Hyundai Motor Group & Auto Parts (Up)
Auto Parts ranked #1 for the week at +7.75%, with Autos at +6.06%. Hyundai AutoEver hit the limit (+136,500 KRW to 592,000), and Kolon (+11,600 KRW to 83,600) underscored broad strength across the group's cluster.
③ Semiconductors & Big-Cap IT (Up)
Samsung Electronics crossed into the $1 trillion market-cap club, while IT Services rose +7.24%. KOSDAQ back-end and materials names — Hanul Semiconductor (+2,300 limit-up), Sigetronics (+2,380 limit-up), and Dawon Nexview (+5,150 limit-up) — extended the leadership.
④ Shipbuilding Leveraged ETNs (Down)
Kiwoom Leverage Shipbuilding TOP10 ETN (-15,680 KRW) and Samsung iSelect Leverage Shipbuilding TOP10 TR ETN (-3,745 KRW) sold off sharply. After a sharp short-term rally in shipbuilders, profit-taking surfaced most visibly through these leveraged products.
⑤ Healthcare/Bio Underperformance
Aprogen Biologics (-520 KRW) and Aprogen (-540 KRW) sat among the week's weakest names. As capital rotated toward export-cyclical large caps, growth/biotech segments saw clear outflows.
💰 Foreign & Institutional Weekly Flow
Aggregated weekly flow data was not separately disclosed, but reported close-of-day numbers for Friday (May 8) showed foreigners buying KRW 404.4B and institutions KRW 80.3B on the KOSDAQ, against retail selling of KRW 473.9B. Given the magnitude of the KOSPI's record-setting rally and Samsung's $1T milestone, the move is hard to explain without sustained foreign block-buying of large caps. The likely pattern across the week was foreign and institutional concentration into autos, cables, and semiconductors, with retail consistently taking profits.
This flow dynamic was the proximate driver of the KOSPI vs. KOSDAQ bifurcation. As foreign and institutional money clustered in the largest names by market cap, KOSDAQ small/mid-caps — under persistent retail selling — were left without a momentum catalyst.
🌍 Global Impact
| Index/Asset | Close | Change |
|---|---|---|
| S&P 500 | 7,398.93 | +0.84% |
| Nasdaq | 26,247.08 | +1.71% |
| Dow | 49,609.16 | +0.02% |
| USD/KRW | 1,461.48 | - |
US markets — particularly the tech-heavy Nasdaq +1.71% — created a tailwind for Korea's semiconductor and IT cluster, reinforcing the strength in IT Services (+7.24%) and Electronics (+3.49%).
The won, however, remained on the back foot. USD/KRW closed at 1,461.48, having traded as high as the upper-1,470s. While that backdrop is favorable for Korean exporters (autos, semis), it also limits foreign appetite for EM-funded inflows. Late-week US data — April Non-Farm Payrolls, the Unemployment Rate, and ISM Services PMI — pushed the Fed's rate path back to the front of investors' minds heading into next week.
📋 This Week's Economic Indicators & Earnings
Global High-Impact Calendar
| Date | Country | Event | Forecast | Previous | Actual (per news) |
|---|---|---|---|---|---|
| 5/5 | AUD | RBA Cash Rate | 4.35% | 4.10% | TBD |
| 5/5 | AUD | RBA Monetary Policy Statement / Press Conf. | - | - | TBD |
| 5/5 | USD | ISM Services PMI | 53.7 | 54.0 | TBD |
| 5/5 | USD | JOLTS Job Openings | 6.86M | 6.88M | TBD |
| 5/6 | NZD | Employment Change q/q | 0.3% | 0.5% | TBD |
| 5/6 | NZD | Unemployment Rate | 5.4% | 5.4% | TBD |
| 5/8 | GBP | BOE Gov. Bailey Speaks | - | - | TBD |
| 5/8 | CAD | Employment Change | 12.9K | 14.1K | TBD |
| 5/8 | CAD | Unemployment Rate | 6.7% | 6.7% | TBD |
| 5/8 | USD | Non-Farm Employment Change | 65K | 178K | TBD |
| 5/8 | USD | Unemployment Rate | 4.3% | 4.3% | TBD |
| 5/8 | USD | Average Hourly Earnings m/m | 0.3% | 0.2% | TBD |
Early-week focus rested on the RBA decision and US ISM Services PMI/JOLTS, while the back-half of the week pivoted to the US April jobs report. With NFP forecast to slow sharply from 178K to 65K, the print stands to drive a meaningful repricing of the Fed's rate path.
Domestic Disclosures & Earnings News
Aggregated DART disclosure data was not separately compiled this week, but reported newsflow highlighted Q1 results and major filings from SK hynix, Woori Industries, Kia, Uniquest, Harim Holdings, and Amorepacific, among others. With the Q1 reporting cycle in its later innings, semiconductor heavyweight earnings beats (Samsung Electronics, SK hynix) provided fundamental support to the broad large-cap leadership on the KOSPI.
🔮 Next Week Outlook & Key Risks
The week of May 11 – May 15 carries significant macro weight. US April CPI/PPI are likely to dominate, alongside a string of FOMC speakers reacting to the April jobs print and refining the Fed's policy signal.
- US April CPI/PPI: Whether the disinflation trend is sustained will be the swing variable for June FOMC expectations
- FOMC Speakers: Watch for the policy interpretation of slowing payrolls combined with sticky wage gains
- Korea Q1 Earnings Wrap-Up: KOSDAQ small/mid-cap differentiation expected to accelerate
- KOSPI 7,500 Hold: A test between extension of momentum and renewed profit-taking pressure
- KOSDAQ 1,200 Reclaim: A key level if the bifurcation is to ease
Principal risks: (1) technical overbought conditions following the +10.54% weekly surge; (2) prolonged USD/KRW weakness above 1,460 raising the bar for foreign EM allocation; (3) volatility in the Fed's rate path on the back of US inflation/labor data; (4) deeper KOSPI vs. KOSDAQ bifurcation; (5) follow-through downside in shipbuilding, gaming, and biotech laggards; and (6) elevated volatility in the cable and Hyundai-affiliated names that drove the weekly rally.
⚠️ Investment Disclaimer
This weekly review is an informational summary based on publicly available market data and news reports. It does not constitute investment advice, an offer, or a solicitation to buy or sell any specific security. The KOSPI's +10.54% weekly gain is historically uncommon, and such episodes are typically followed by elevated volatility and profit-taking risk. Daily limit-up names are particularly momentum-dependent and can mean-revert sharply. KOSDAQ small/mid-caps remain vulnerable should the large-cap concentration trend persist.
USD/KRW stability above 1,460 is a double-edged sword — supportive for exporters but a headwind to foreign EM allocations. With US CPI/PPI, FOMC speakers, and the interpretation of April NFP scheduled for next week, sharp swings in global rates and the dollar are entirely possible. All investment decisions are the sole responsibility of the investor. Past performance does not guarantee future results.
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