Daily Market Report - August 21, 2026

Report Generated: August 21, 2026, 04:05 PM
Prepared by: Sangyong’s Market Intelligence US Market: After Hours Korean Market: Closed

EXECUTIVE SUMMARY

Market Character: US Gains, Korean Selloff

US markets gained on Friday, 2026-08-21, with the Dow leading at +0.98%. Meanwhile, Korean markets continued recovery.

Today at a Glance

⚠️ Note: US markets are in after-hours (closed at 4PM ET). Data shown is from today’s session.

⚠️ Note: Korean markets are closed today. Data shown is from last trading day.

Daily Performance:

• 🇺🇸 S&P 500: +0.43%
• 🇺🇸 Dow Jones: +0.98%
• 🇺🇸 Nasdaq: +0.43%
• 🇰🇷 KOSPI: +0.88%
• 🇰🇷 KOSDAQ: -4.63%

Key Themes:

1. US Markets - S&P +0.43%, Nasdaq +0.43%
2. Korean Recovery - KOSPI +0.88%
3. Won Strengthens - KRW -0.43%
4. Treasury Yields - 10Y at 4.6500000000%

📊 DAILY STOCK PERFORMANCE

US Magnificent 7

Daily Analysis:

The Magnificent 7 showed mostly positive results with 4 stocks advancing. TSLA led with +5.14% change. NVDA lagged at -0.98%.

📈 MAJOR INDICES - DAILY PERFORMANCE

US Indices

Korean Indices

Analysis:

US markets showed strength with the S&P 500 up +0.43%. Korean markets continued recovery with KOSDAQ gaining -4.63%.

💱 CURRENCY & COMMODITIES

Currency Markets

USD/KRW:

• Rate: ₩1,384
• Change: ₩6.01
• % Change: -0.43% (KRW Strength)

Analysis: The won firmed -0.43% (₩1,384/USD) — mild KRW strength suggests improving confidence in Korean markets. Export-heavy companies (Samsung, Hyundai) face modest margin headwinds.

US Bond Yields

Korean Stocks

Analysis: Korean stocks showed mixed performance with 2 of 3 stocks declining.

🎯 DAY-BY-DAY RECAP

Friday, August 21, 2026: US Gains, Korean Selloff

Market Action:

• 🇺🇸 Nasdaq +0.43%, S&P +0.43%, Dow +0.98%
• 🇺🇸 TSLA +5.14%
• 🇰🇷 KOSPI +0.88%, KOSDAQ -4.63%
• 💱 KRW -0.43% (strength)

🔍 DAILY THEMES & ANALYSIS

Theme 1: US Treasury Yields

The Move: 10Y at 4.6500000000%

Why It Matters:

• Above 4.5% is restrictive — compresses growth stock multiples
• Bond market signals matter for equity valuation across both markets
• Fed guidance and inflation data remain the primary rate drivers

Implication: Trim long-duration growth exposure; shift toward value or shorter-duration bonds.

⚠️ RISK FACTORS

1. US Market Stability — Low Immediate Risk

• S&P 500 moved only +0.43% today — contained action
• No signs of broad panic; orderly price discovery
• Maintain normal positioning; no defensive action needed

2. Tech Concentration Risk — Moderate

• 3 of 7 Mag7 stocks declined; mixed picture
• Selective selling rather than sector-wide capitulation
• Monitor for rotation into defensive names

3. Treasury Yield Risk — Moderate (4.65%)

• 10Y at 4.65% — elevated but stable
• Growth stocks face headwinds; value and dividend plays relatively favored
• Any surprise CPI or jobs data could push yields higher

4. Currency Volatility — Moderate (KRW -0.43%)

• Won moved -0.43% — notable but not extreme
• Monitor for trend continuation; brief moves can snowball in thin markets
• Korean exporters (Samsung, Hyundai) most directly affected

✅ OPPORTUNITIES

1. Fixed Income — 10Y Treasury at 4.65%

Thesis: Yields at multi-year highs offer equity-competitive returns with lower risk

Strategy:

• Allocate 15-20% of new capital to 10Y Treasuries or TLT
• Lock in yield before any Fed pivot compresses rates
• Ladder maturities: mix 2Y, 5Y, 10Y for flexibility

Risk: Yields could move higher if inflation re-accelerates; floating-rate alternatives hedge this

📅 WEEK AHEAD PREVIEW

Economic Calendar

Key Data Releases:

• Monday: No major data
• Tuesday: Check BEA/BLS calendar
• Wednesday: Check Fed calendar
• Thursday: Jobless Claims
• Friday: Check BLS calendar

Technical Levels to Watch

US Markets:

• S&P 500: Support 7,316 (20d low) / 7,644 (MA20) | Resistance 7,798 (20d high)
• Nasdaq: Support 24,442 (20d low) / 26,066 (MA20) | Resistance 26,803 (20d high)
• Dow: Support 51,594 (20d low) | Resistance 53,309 (MA20) / 54,349 (20d high)

🎯 STRATEGIC RECOMMENDATIONS

For Conservative Investors

Today’s Market Context: S&P +0.43%, 10Y Treasury 4.65%

Recommended Action: Maintain current allocation. No strong directional signal today.

Positioning:

• No rebalancing needed. Review quarterly targets if drifted.
• 10Y at 4.65% — above 4.5%, meaningfully restrictive
• Cash buffer: maintain 10-15% for opportunities

For Growth Investors

Today’s Market Context: Nasdaq +0.43%, Mag7 leaders: TSLA, GOOGL

Recommended Action: S&P +0.43%, Nasdaq +0.43% — no strong conviction. Stay the course.

Positioning:

• No tactical adjustments needed. Monitor for a catalyst-driven breakout.
• Elevated yields compress multiples — size tech positions accordingly
• Stop-loss discipline: set alerts 3-5% below entry on any new positions

For Korean Market Investors

Today’s Market Context: KOSPI +0.88%, KOSDAQ -4.63%, KRW -0.43%

Recommended Action: KOSPI +0.88% with stable KRW — favorable setup. Add to Korean positions.

Positioning:

• Samsung (005930) and SK Hynix (000660) as primary vehicles. KOSDAQ strength confirms broad appetite.
• Currency note: KRW modestly lower — no meaningful FX impact today

💡 BOTTOM LINE

What Today Told Us

The Good: ✅ S&P 500 +0.43% positive — bulls holding control ✅ Nasdaq +0.43% positive — tech holding up ✅ Mag7 gainers: TSLA (+5.14%), GOOGL (+1.22%), META (+0.75%) ✅ KOSPI +0.88% — Korean markets holding positive

The Bad: ⚠️ 10Y Treasury 4.65% — above comfort zone for growth stocks

The Opportunity: 💡 Fixed income: 10Y at 4.65% — lock in yield before any rate cut compresses it

📞 DISCLAIMER

This report is for informational purposes only and does not constitute investment advice. Market conditions can change rapidly. Past performance does not guarantee future results. Investors should conduct their own due diligence and consult with qualified financial advisors before making investment decisions.

Report Generated: August 21, 2026, 04:05 PM
Data Sources: Yahoo Finance, Alpha Vantage, Investing.com, Naver Finance
Coverage Period: August 21, 2026 (Friday)
US Market Status: After Hours Korean Market Status: Closed

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Report prepared by Sangyong’s Market Intelligence Empowering investors with data-driven insights