Korea Arbit Strategy Common / Preferred ADR Premium ETF Tracking 15-min delayed · Yahoo Finance
Korean Equity · Statistical Analytics

Where do today's spreads
sit in their history?

Three structurally persistent Korean equity spreads — common vs preferred, ADR vs underlying, leveraged ETF vs index — observed through one statistical engine. Distribution stats, AR(1) half-life, and reversion forecasts under stated model assumptions.

market closed · KST 09:00–15:30 — pairs tracked Yahoo Finance · 15-min delayed

Strategies

Three structurally persistent spreads. Click into any to see the full ranking and live chart.

How it works

Same four steps for every pair. No machine learning, no opaque parameters — every formula is in the codebase.

01 · Pair
Curated universe
A committed seed file lists every pair tracked by each strategy — 108 KR common/preferred pairs, 8 ADR pairs, 6 KOSPI 200 ETF/index pairs. Daily refresh fetches OHLC for both legs from Yahoo Finance.
02 · Spread
One number per day
Each strategy reduces the pair to a single scalar — Common/Preferred uses preferred ÷ common, ADR Premium FX-adjusts the ADR vs underlying, ETF Tracking measures cumulative log-return drift against the leveraged benchmark.
03 · Distribution
Where today sits
From the full history we compute empirical mean, std, and percentiles. Today's value lands somewhere on that distribution, expressed as a z-score and a percentile rank — concrete answers to "is this far from normal?"
04 · Reversion
AR(1) forecast
An AR(1) regression yields the half-life and a forecast distribution at horizon h = 60 trading days. The displayed MR probability is the model's estimated likelihood that the spread moves toward its historical mean within that window, under standard AR(1) and normal-residual assumptions.
Important. This site presents historical statistical observations only. Nothing here is investment advice, a recommendation, a solicitation, or a forecast of guaranteed outcomes. Quotes are delayed approximately 15 minutes per Yahoo Finance's standard feed. Past distributions do not predict future prices. Korean preferred shares, ADRs, and leveraged ETFs carry liquidity, dividend, FX, corporate-action, and product-specific risks not modeled here. See Terms and Privacy.

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Last updated: 2026-05-06

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Questions about this policy can be directed via the GitHub repository linked in the footer.

Terms of Use

Last updated: 2026-05-06

Informational only

The content on this site — including price spreads, distribution statistics, AR(1) parameters, and "mean-reversion probabilities" — is provided for educational and informational purposes only. It is not investment advice, a recommendation to buy or sell any security, a solicitation, or a forecast of guaranteed outcomes.

No fiduciary or advisory relationship

Use of this site does not create any advisory, fiduciary, or client relationship. The operators of this site are not registered investment advisers in any jurisdiction.

Data and accuracy

Market data is sourced from Yahoo Finance and is delayed by approximately 15 minutes. Data may be inaccurate, incomplete, or interrupted. Statistical metrics are computed under stated model assumptions (AR(1), normality) which may not hold in practice. Corporate actions, halts, and product-specific structural risks may not be fully reflected.

No reliance / no guarantee

Past statistical patterns do not predict future prices. The displayed "mean-reversion probability" is a model output, not a guarantee. Users must perform their own due diligence and consult a licensed adviser before making any investment decision.

Limitation of liability

The site is provided "as is", without warranty of any kind. To the fullest extent permitted by law, the operators disclaim all liability for any direct, indirect, incidental, consequential, or punitive damages arising from use of, reliance on, or inability to access the site or its content.

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Users are responsible for ensuring their use of this site complies with the laws and regulations of their jurisdiction, including any restrictions on investment information or solicitation.

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market closed

Ranking

Sorted by mean-reversion probability over the next 60 trading days.

Pair Spread z Pct MR 60d σ 1y σ 3y Half-life Hist
Korea Arbit Strategy · data: Yahoo Finance · last build: —
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