MBS Prepayment Speed
MBS Prepayment Speed — Refinancing and turnover driven cash-flow uncertainty in agency mortgages.
Definition
MBS Prepayment Speed refers to refinancing and turnover driven cash-flow uncertainty in agency mortgages. Keep that definition fixed when comparing series, managers, or regimes — renaming the same tape does not create a new signal.
Why it matters
Duration, curve, and carry decide whether a macro view survives into P&L. When refinancing and turnover driven cash-flow uncertainty in agency mortgages 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 mbs prepayment speed is saying. If refinancing and turnover driven cash-flow uncertainty in agency mortgages 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
Always state the tenor and roll-down assumption; parallel-shift shortcuts hide curve risk. Prefer a short written null hypothesis for MBS Prepayment Speed: what would falsify the current reading in the next window?
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