ERA / ARB ratio and spread
1 ERA = 0.4124748 ARB. Below is the price ratio chart and the regression spread z-score. Hedge ratio β is 1.210 and the correlation between the legs is 0.46.
If you hold ERA · If you hold ARB
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Key numbers
over 452 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 together only moderately — correlation of daily log returns is 0.46, with a hedge ratio of 1.21. Signals from this pair carry more noise than on a tightly linked one.
The spread is at -1.46 standard deviations from its rolling mean: away from the norm, but not far enough to call it stretched.
Reversion is slow: the spread needs roughly 64 days to cover half the way back to its mean. A position would have to be held for a long time.
The current ratio sits near the bottom of its range — only 3% of the way from the low to the high of the last 452 daily candles.
Frequently asked
How many ARB is 1 ERA?
1 ERA is worth 0.412475 ARB at the latest exchange quotes. The figure is the ratio of the two USDT prices and updates every minute.
What is the ERA/ARB range?
Over the last 452 daily candles the ratio traded between 0.276882 (19.09.2026) and 4.49912 (17.07.2025).
Are ERA and ARB correlated?
The correlation of daily log returns between ERA and ARB is 0.46, which counts as a moderate 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 ERA/ARB spread z-score now?
The z-score is -1.46 — the spread is within its usual range. It measures how far the regression residual log(A) − β·log(B) sits from its rolling mean, in standard deviations.
Is ERA/ARB suitable for a pair trade?
The mechanics hold up: correlation is 0.46 and the spread historically covers half the way back to its mean in about 64 days. That is a description of past behaviour, not a forecast or a recommendation.
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.