· Sangyong · Market Analysis · 3 min read
Weekly Market Review - October 10, 2026
The week of October 05-09, 2026 was characterized as Mixed / Indecisive. US markets finished essentially flat with the S&P 500 at +0.48% and the Nasdaq at -0.40%. 5 of 7 Magnificent 7 stocks advanced on the week. Korean
Prepared by Sangyong’s Market Intelligence
Executive Summary
Week Character: Mixed / Indecisive
The week of October 05-09, 2026 was characterized as Mixed / Indecisive. US markets finished essentially flat with the S&P 500 at +0.48% and the Nasdaq at -0.40%. 5 of 7 Magnificent 7 stocks advanced on the week. Korean markets closed sharply lower, with KOSPI at -5.39% and KOSDAQ at -0.11%.
The 10Y Treasury yield rose 4 bps to 5.28%, with little impact on equity multiples. The Korean won strengthened 0.04% against the dollar — a negligible FX effect.
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 | $333 | $337 | +1.13% | 🟢 |
| Microsoft | MSFT | $525 | $535 | +1.88% | 🟢 |
| Alphabet | GOOGL | $346 | $352 | +1.50% | 🟢 |
| Amazon | AMZN | $251 | $262 | +4.39% | 🟢 |
| NVIDIA | NVDA | $239 | $229 | -4.03% | 🔴 |
| Meta | META | $742 | $719 | -3.13% | 🔴 |
| Tesla | TSLA | $379 | $383 | +1.05% | 🟢 |
Korean Market Leaders
| Stock | Symbol | Mon Open (₩) | Fri Close (₩) | Weekly Change | Trend |
|---|---|---|---|---|---|
| Samsung Elec. | 005930 | ₩276,000 | ₩263,000 | -4.71% | 🔴 |
| SK Hynix | 000660 | ₩1,842,000 | ₩1,686,000 | -8.47% | 🔴 |
| Hyundai Motor | 005380 | ₩347,000 | ₩324,500 | -6.48% | 🔴 |
Indices
| Index | Mon Open | Fri Close | Weekly Change | Trend |
|---|---|---|---|---|
| S&P 500 | 7,773.95 | 7,811.54 | +0.48% | 🟢 |
| Nasdaq | 27,477.31 | 27,366.17 | -0.40% | 🔴 |
| Dow Jones | 51,267.90 | 51,654.95 | +0.75% | 🟢 |
| KOSPI | 7,003.74 | 6,625.93 | -5.39% | 🔴 |
| KOSDAQ | 893.29 | 892.27 | -0.11% | 🔴 |
Currency (KRW/USD)
- Monday: ₩1,341
- Friday: ₩1,341
- Weekly Change: -0.04% (KRW strengthened — USD weaker)
- Impact: Negligible FX impact this week.
U.S. 10-Year Treasury Yield
- Monday: 5.24%
- Friday: 5.28%
- Weekly Change: +4 bps
- Implication: Stable yields — no rate-driven equity repricing this week.
Weekly Trends and Themes
1. US Market Performance
S&P 500: +0.48% | Nasdaq: -0.40% | Dow: +0.75%
The S&P 500 was essentially flat on the week (+0.48%), with no decisive directional move — buyers and sellers in equilibrium.
Magnificent 7: 5 of 7 Mag7 stocks advanced. Best: Amazon (+4.39%), worst: NVIDIA (-4.03%).
Takeaway: Consolidation week — no tactical change needed.
2. Korean Market Performance
KOSPI: -5.39% | KOSDAQ: -0.11% (weekly)
KOSPI fell -5.39% — a significant weekly decline; avoid new entries until price stabilizes.
KOSDAQ essentially flat (-0.11%), outperforming KOSPI — risk appetite favoring small/mid caps.
Among Korean blue chips: Samsung led (-4.71%), SK Hynix lagged (-8.47%).
Takeaway: Weak week — wait for stabilization before new entries.
3. Currency Impact (KRW/USD)
Weekly KRW Move: -0.04% ₩1,341 → ₩1,341
The won was virtually unchanged (-0.04%) — no currency-driven distortion to Korean equity returns this week.
Investor Implication: Neutral for Korean stock investors denominated in USD.
Export sector note: Stable KRW — no meaningful FX-driven earnings revision expected.
4. Treasury Yields
10Y: 5.24% → 5.28% (+4 bps)
The 10Y Treasury yield held steady at ~5.28% (+4 bps for the week) — no yield-driven repricing of equities.
Market Implication: Stable rates support growth stock multiples.
5. Key Weekly Observation
- US outperformed Korea by 5.9pp this week — US macro strength or global risk rotation toward dollar assets is the likely driver.
- Wide Mag7 dispersion this week (8.4pp between best and worst) — stock-pickers’ market; index-level moves understate individual name volatility.
Best and Worst Performers
Best (Weekly Upside Movers):
- Amazon: +4.39% ████████
- Microsoft: +1.88% ███
- Alphabet: +1.50% ██
- Apple: +1.13% ██
- Tesla: +1.05% ██
Worst (Weekly Declines):
- Samsung: -4.71% █████████
- Hyundai: -6.48% ████████████
- SK Hynix: -8.47% ████████████████
Commentary:
Amazon led the group at +4.39% — solid outperformance suggesting relative institutional buying interest.
SK Hynix was the clear laggard at -8.47% — a decline of this magnitude warrants a fundamental review. Check whether this reflects a company-specific negative (guidance cut, regulatory headwind) or macro pressure.
5 of 10 stocks advanced. Negative breadth — more stocks declining than advancing.
Weekly Review Compiled: October 10, 2026 at 12:10 PM Analysis Period: October 05 - 09, 2026 Data Sources: Daily market reports, Naver Finance, Yahoo Finance, FRED