Weekly Market Review - September 05, 2026

Prepared by Sangyong’s Market Intelligence

Executive Summary

Week Character: Mixed / Indecisive

The week of August 31-04, 2026 was characterized as Mixed / Indecisive. US markets finished essentially flat with the S&P 500 at +0.42% and the Nasdaq at +0.52%. 3 of 7 Magnificent 7 stocks advanced on the week. Korean markets closed moderately lower, with KOSPI at -1.95% and KOSDAQ at -2.49%.

The 10Y Treasury yield rose 12 bps to 4.79%, adding pressure on growth stock valuations. The Korean won strengthened 1.66% against the dollar, providing a mild FX tailwind for USD investors.

Key stat: Divergent markets — cross-asset selectivity mattered more than directional bets.

Weekly Performance Summary

U.S. Magnificent 7

Korean Market Leaders

Indices

Currency (KRW/USD)

• Monday: ₩1,367
• Friday: ₩1,345
• Weekly Change: -1.66% (KRW strengthened — USD weaker)
• Impact: FX tailwind for USD investors in Korean equities.

U.S. 10-Year Treasury Yield

• Monday: 4.67%
• Friday: 4.79%
• Weekly Change: +12 bps
• Implication: +12 bps — rising yields pressure high-multiple growth stocks; materially restrictive.

Weekly Trends and Themes

1. US Market Performance

S&P 500: +0.42% | Nasdaq: +0.52% | Dow: +0.43%

The S&P 500 was essentially flat on the week (+0.42%), with no decisive directional move — buyers and sellers in equilibrium.

Magnificent 7: 3 of 7 Mag7 stocks advanced. Best: Meta (+7.76%), worst: Tesla (-3.77%).

Takeaway: Consolidation week — no tactical change needed.

2. Korean Market Performance

KOSPI: -1.95% | KOSDAQ: -2.49% (weekly)

KOSPI slipped -1.95% — a modest pullback; watch whether the selling accelerates or fades.

KOSDAQ moderately lower (-2.49%), underperforming KOSPI — investors preferring large-cap stability.

Among Korean blue chips: SK Hynix led (-1.61%), Hyundai lagged (-4.96%).

Takeaway: Weak week — wait for stabilization before new entries.

3. Currency Impact (KRW/USD)

Weekly KRW Move: -1.66% ₩1,367 → ₩1,345

The won strengthened notably (-1.66%, ₩1,367 → ₩1,345) — a tailwind for USD investors; currency appreciation boosts USD-basis returns from Korean equities.

Investor Implication: Positive for USD investors — total return (price + FX) exceeds the index gain.

Export sector note: KRW strength compresses USD-reported revenues for Korean exporters — margin headwind for next quarter.

4. Treasury Yields

10Y: 4.67% → 4.79% (+12 bps)

The 10Y yield drifted higher by +12 bps to 4.79% — a modest rise, not enough to drive a major equity repricing.

Market Implication: Mild headwind for high-multiple names; monitor direction next week.

5. Key Weekly Observation

• US outperformed Korea by 2.4pp this week — US macro strength or global risk rotation toward dollar assets is the likely driver.
• Wide Mag7 dispersion this week (11.5pp between best and worst) — stock-pickers’ market; index-level moves understate individual name volatility.

Best and Worst Performers

Best (Weekly Upside Movers):

• Meta: +7.76% ███████████████
• NVIDIA: +4.47% ████████
• Apple: +0.98% █
• Alphabet: -0.26%
• Amazon: -0.49%

Worst (Weekly Declines):

• Samsung: -1.73% ███
• Tesla: -3.77% ███████
• Hyundai: -4.96% █████████

Commentary:

Meta was the standout winner at +7.76% — 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.

Hyundai underperformed at -4.96% — watch whether the weakness continues into next week or reverses.

3 of 10 stocks advanced. Negative breadth — more stocks declining than advancing.

Weekly Review Compiled: September 05, 2026 at 12:10 PM Analysis Period: August 31 - 04, 2026 Data Sources: Daily market reports, Naver Finance, Yahoo Finance, FRED