· Sangyong · Market Analysis · 3 min read
Weekly Market Review - May 23, 2026
Prepared by OpenCode Market Intelligence
Executive Summary
Week Character: Global Risk-On
The week of May 18-22, 2026 was characterized as Global Risk-On. US markets finished modestly higher with the S&P 500 at +0.95% and the Nasdaq at +0.97%. 3 of 7 Magnificent 7 stocks advanced on the week. Korean markets closed sharply higher, with KOSPI at +4.41% and KOSDAQ at +4.50%.
The 10Y Treasury yield fell 2 bps to 4.57%, with little impact on equity multiples. The Korean won weakened 2.05% against the dollar, a meaningful FX headwind for USD investors in Korean equities.
Key stat: Divergent markets — cross-asset selectivity mattered more than directional bets.
Weekly Performance Summary
U.S. Magnificent 7
| Stock | Symbol | Mon Open | Fri Close | Weekly Change | Trend |
|---|---|---|---|---|---|
| Apple | AAPL | $298 | $309 | +3.69% | 🟢 |
| Microsoft | MSFT | $424 | $419 | -1.17% | 🔴 |
| Alphabet | GOOGL | $397 | $383 | -3.52% | 🔴 |
| Amazon | AMZN | $265 | $266 | +0.55% | 🟢 |
| NVIDIA | NVDA | $222 | $215 | -3.14% | 🔴 |
| Meta | META | $611 | $610 | -0.16% | 🔴 |
| Tesla | TSLA | $410 | $426 | +3.91% | 🟢 |
Korean Market Leaders
| Stock | Symbol | Mon Open (₩) | Fri Close (₩) | Weekly Change | Trend |
|---|---|---|---|---|---|
| Samsung Elec. | 005930 | ₩281,000 | ₩292,500 | +4.09% | 🟢 |
| SK Hynix | 000660 | ₩1,840,000 | ₩1,941,000 | +5.49% | 🟢 |
| Hyundai Motor | 005380 | ₩663,000 | ₩655,000 | -1.21% | 🔴 |
Indices
| Index | Mon Open | Fri Close | Weekly Change | Trend |
|---|---|---|---|---|
| S&P 500 | 7,403.05 | 7,473.47 | +0.95% | 🟢 |
| Nasdaq | 26,090.73 | 26,343.97 | +0.97% | 🟢 |
| Dow Jones | 49,686.12 | 50,579.70 | +1.80% | 🟢 |
| KOSPI | 7,516.04 | 7,847.71 | +4.41% | 🟢 |
| KOSDAQ | 1,111.09 | 1,161.13 | +4.50% | 🟢 |
Currency (KRW/USD)
- Monday: ₩1,489
- Friday: ₩1,520
- Weekly Change: +2.05% (KRW weakened — USD stronger)
- Impact: Meaningful FX drag for USD investors in Korean equities.
U.S. 10-Year Treasury Yield
- Monday: 4.59%
- Friday: 4.57%
- Weekly Change: -2 bps
- Implication: Stable yields — no rate-driven equity repricing this week.
Weekly Trends and Themes
1. US Market Performance
S&P 500: +0.95% | Nasdaq: +0.97% | Dow: +1.80%
The S&P 500 advanced +0.95% for the week, with Nasdaq outperforming at +0.97%. The rally was broad-based, with tech and value names both participating.
Magnificent 7: 3 of 7 Mag7 stocks advanced. Best: Tesla (+3.91%), worst: Alphabet (-3.52%).
Takeaway: Consolidation week — no tactical change needed.
2. Korean Market Performance
KOSPI: +4.41% | KOSDAQ: +4.50% (weekly)
KOSPI surged +4.41% — a strong weekly gain suggesting genuine institutional re-entry, not just short-covering.
KOSDAQ sharply higher (+4.50%), outperforming KOSPI — risk appetite favoring small/mid caps.
Among Korean blue chips: SK Hynix led (+5.49%), Hyundai lagged (-1.21%).
Takeaway: Strong week for Korean markets — partial position add appropriate.
3. Currency Impact (KRW/USD)
Weekly KRW Move: +2.05% ₩1,489 → ₩1,520
The won weakened significantly (+2.05%, ₩1,489 → ₩1,520) — a meaningful drag for USD-denominated investors in Korean equities. A 2.1% currency loss partially or fully offsets any index gain.
Investor Implication: Hedge KRW exposure or reduce Korean position size to account for FX drag.
Export sector note: KRW weakness boosts revenues for Samsung, Hyundai, SK Hynix when reported in USD — watch for guidance upgrades.
4. Treasury Yields
10Y: 4.59% → 4.57% (-2 bps)
The 10Y Treasury yield held steady at ~4.57% (-2 bps for the week) — no yield-driven repricing of equities.
Market Implication: Stable rates support growth stock multiples.
5. Key Weekly Observation
- Korea outperformed the US by 3.5pp this week — unusual divergence; watch for foreign net buying data to confirm institutional re-entry.
Best and Worst Performers
Best (Weekly Upside Movers):
- SK Hynix: +5.49% ██████████
- Samsung: +4.09% ████████
- Tesla: +3.91% ███████
- Apple: +3.69% ███████
- Amazon: +0.55% █
Worst (Weekly Declines):
- Hyundai: -1.21% ██
- NVIDIA: -3.14% ██████
- Alphabet: -3.52% ███████
Commentary:
SK Hynix was the standout winner at +5.49% — a weekly gain of this size reflects either strong earnings catalysts, analyst upgrades, or a short-covering squeeze. Verify whether the move is fundamental or technical before chasing.
Alphabet underperformed at -3.52% — watch whether the weakness continues into next week or reverses.
5 of 10 stocks advanced. Negative breadth — more stocks declining than advancing.
Weekly Review Compiled: May 23, 2026 at 02:11 PM Analysis Period: May 18 - 22, 2026 Data Sources: Daily market reports, Naver Finance, Yahoo Finance, FRED