On the Run Specialness
On the Run Specialness — Scarcity of the current coupon in repo creating special rates.
Definition
On the Run Specialness refers to scarcity of the current coupon in repo creating special rates. Keep that definition fixed when comparing series, managers, or regimes — renaming the same tape does not create a new signal.
Why it matters
Funding and market liquidity decide whether a position can be entered, held, or exited at size. When scarcity of the current coupon in repo creating special rates shifts, related hedges, limits, and narratives usually need an explicit update rather than a quiet assumption.
Case
Suppose a desk is positioned for the opposite of what on the run specialness is saying. If scarcity of the current coupon in repo creating special rates moves against that book, the first question is not “is the story clever?” but whether size, hedges, and stop logic still match the observation.
How to read it
Watch spreads, depth, and dealer balance-sheet proxies; headline prices can look fine while exit is gone. Prefer a short written null hypothesis for On the Run Specialness: what would falsify the current reading in the next window?
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