U / FF ratio and spread
1 U = 6.798 FF. Below is the price ratio chart and the regression spread z-score. Hedge ratio β is -0.001 and the correlation between the legs is -0.11.
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Key numbers
over 246 daily candles
How each of these is computed: regression spread, hedge ratio, spread z-score, half-life, correlation.
What the numbers say
The fitted hedge ratio is negative: over the window U and FF moved in opposite directions. A pair trade assumes the legs move together, so this combination does not qualify as one.
The spread is at 0.45 standard deviations from its rolling mean, which is effectively at its own norm.
Historically the spread covers half the way back to its mean in about 7 days, so a divergence here tends to resolve within weeks rather than months.
The current ratio sits near the bottom of its range — only 10% of the way from the low to the high of the last 246 daily candles.
Frequently asked
How many FF is 1 U?
1 U is worth 6.79761 FF at the latest exchange quotes. The figure is the ratio of the two USDT prices and updates every minute.
What is the U/FF range?
Over the last 246 daily candles the ratio traded between 5.66861 (10.04.2026) and 16.7722 (10.07.2026).
Are U and FF correlated?
The correlation of daily log returns between U and FF is -0.11, which counts as a weak 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 U/FF spread z-score now?
The z-score is 0.45 — 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 U/FF suitable for a pair trade?
No. The fitted hedge ratio is negative, meaning the legs moved in opposite directions over the window — the market-neutral construction that pair trading relies on does not hold here.
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.