ARB / SEI ratio and spread
1 ARB = 3.825 SEI. Below is the price ratio chart and the regression spread z-score. Hedge ratio β is 0.830 and the correlation between the legs is 0.72.
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Key numbers
over 358 daily candles
How each of these is computed: regression spread, hedge ratio, spread z-score, half-life, correlation.
What the numbers say
The legs move closely together — correlation of daily log returns is 0.72. The fitted hedge ratio is 0.83, meaning roughly 0.83 units of SEI exposure balance one unit of ARB.
The spread currently sits at 2.36 standard deviations above its rolling mean — ARB is expensive relative to SEI by the standards of this window.
The spread has not shown mean reversion over the sample: estimates longer than the available history are discarded rather than reported. Trading this pair on reversion has no statistical footing here.
The current ratio sits mid-range — 76% of the way from the low to the high of the last 358 daily candles.
Frequently asked
How many SEI is 1 ARB?
1 ARB is worth 3.82542 SEI at the latest exchange quotes. The figure is the ratio of the two USDT prices and updates every minute.
What is the ARB/SEI range?
Over the last 358 daily candles the ratio traded between 1.29496 (25.06.2026) and 4.61348 (19.09.2026).
Are ARB and SEI correlated?
The correlation of daily log returns between ARB and SEI is 0.72, which counts as a strong link. Log returns are used rather than prices: two rising assets correlate almost by default, joint day-to-day movement is what matters.
What is the ARB/SEI spread z-score now?
The z-score is 2.36 — the spread is stretched beyond two standard deviations. It measures how far the regression residual log(A) − β·log(B) sits from its rolling mean, in standard deviations.
Is ARB/SEI suitable for a pair trade?
Not on a reversion thesis. The spread has not returned to its mean within the available history, so there is nothing to trade back to.
Related pairs
Other pairs sharing a leg with this one.
All figures are computed from exchange data and describe past behaviour. Nothing here is investment advice.