Nasdaq 100 vs KOSPI Correlation 2026
Cross-market correlation analysis between Nasdaq 100 (US) and KOSPI (South Korea). Research-only. Not investment advice.
Last updated: Apr 8, 2026 · NDX: 24,189 · KOSPI: 5,872
QUICK ANSWER · AS OF Apr 8, 2026
What is the NDX vs KOSPI correlation in 2026?
The NDX-KOSPI 30D correlation is 0.75 (5Y baseline: 0.52). Nasdaq 100 at 24,189 (YTD: -7.4%), KOSPI at 5,872 (YTD: +5.2%). Regime: high correlation.
30D Corr
0.75
5Y Baseline
0.52
NDX
24,189
KOSPI
5,872
Nasdaq-KOSPI correlation is elevated due to shared semiconductor exposure. Samsung and SK Hynix (KOSPI heavyweights) are direct suppliers to Nvidia and other Nasdaq tech giants.
Correlation Dashboard
Nasdaq 100 (US)
24,189
YTD: -7.4%
KOSPI (South Korea)
5,872
YTD: +5.2%
30D Correlation
0.75
90D Correlation
0.70
1Y Correlation
0.65
5Y Baseline
0.52
Regime Analysis
Nasdaq-KOSPI correlation is elevated due to shared semiconductor exposure. Samsung and SK Hynix (KOSPI heavyweights) are direct suppliers to Nvidia and other Nasdaq tech giants.
Divergence Score
Score
77/100
Signal
CRITICAL
Deviation
0.23
Score = |30D corr − 5Y baseline| / 0.30 × 100, capped at 100. Higher = greater deviation from historical norm.
Data Freshness & Timezone
Each index is observed at its local market close. Cross-timezone correlations align returns to the later-closing market's trading day.
| Index | Market | Close Time (Local) | Timezone | As Of |
|---|---|---|---|---|
| NDX | US | 16:00 | ET (-04:00) | 2026-04-08 |
| KOSPI | South Korea | 15:30 | KST (+09:00) | 2026-04-08 |
Methodology
Correlations are Pearson rolling correlations of daily log returns, computed over the specified window (30D, 90D, 1Y). Returns are calculated from local-currency index levels at each market's official close time.
For cross-timezone pairs (e.g., NDX in ET vs KOSPI in KST), returns are aligned to the later-closing market's trading day. This means NDX's return on day T is paired with KOSPI's return on the same calendar day.
Regime classification: high (≥0.60), moderate (0.35–0.59), low (0.15–0.34), negative (<0.15). The 5-year baseline represents the average 90D rolling correlation over 2021–2025.
Known Limitations:
- Timezone misalignment: NDX (ET) and KOSPI (KST) close at different times. Asian markets close before European/US markets open, so "same-day" correlations reflect lagged information flow.
- Holiday calendars: Different national holidays create gaps in return series. Missing days are excluded from correlation calculations.
- Currency effects: Correlations are computed in local currency. FX movements (e.g., USD/JPY, EUR/USD) are embedded in the correlation but not isolated.
- Regime dependency: Correlations are backward-looking and can shift rapidly during crises. The 30D window captures recent dynamics but may not reflect structural relationships.
v0.1-beta · Research use only — not investment advice.
Frequently Asked Questions
What is the NDX-KOSPI correlation in 2026? ▾
The 30-day rolling correlation between Nasdaq 100 and KOSPI is 0.75 as of Apr 8, 2026. The 5-year baseline is 0.52. Current regime: high correlation.
Why does the NDX-KOSPI correlation matter? ▾
The correlation between Nasdaq 100 (US) and KOSPI (South Korea) measures how closely these markets move together. High correlation means diversification benefits are limited; low correlation means the markets respond to different drivers, offering potential diversification. Changes in correlation can signal regime shifts in global capital flows.
Is this a trading signal? ▾
No. This page provides research-only cross-market correlation analysis. It does not constitute investment advice or a recommendation to trade.
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📎 Cite This Data ▾
APA 7th Edition
AhaSignals. (2026). NDX-KOSPI Correlation. Retrieved April 18, 2026, from https://ahasignals.com/equity-correlation/ndx-kospi/
Methodology: v0.1-beta
Data as-of: Apr 8, 2026
Research purposes only. Not investment advice. All index inputs from free, public, clickable sources.
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This page is for informational and research purposes only — not investment advice. Equity markets are volatile. Past correlation patterns do not predict future performance. Index levels are derived from publicly available market observations. © 2026 AhaSignals. All rights reserved.