Borrow Fee Rate
Borrow Fee Rate (Equity).
Definition
Borrow Fee Rate refers to borrow Fee Rate (Equity). Keep that definition fixed when comparing series, managers, or regimes — renaming the same tape does not create a new signal.
Why it matters
Equity risk premia compress or expand with earnings paths and factor regimes. When borrow Fee Rate (Equity) 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 borrow fee rate is saying. If borrow Fee Rate (Equity) 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
Separate index beta from residual; know the sector and factor loadings of the claim. Prefer a short written null hypothesis for Borrow Fee Rate: what would falsify the current reading in the next window?
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