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The Jolly Contrarian’s Glossary

The snippy guide to financial services lingo.™
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Warning: metaphysical area approaching. Approach stacked turtles with care.

AKA fungible. When you you have been given something — credit support, for very good example — which at some point you’ll have to give back. You have to give an identical thing back.

Now, when it comes to return it, dilemma: you’ve been mucking around with it. You don’t still have “it”, per se. You can go and buy a new one, but the actual one they gave you — that’s goneski.

Hey — you got it by title transfer, so it was yours to muck around with wasn’t it? Or, hey, ok so they pledged it to you, but you had, you know, a right of rehypothecation didn’t you, so you were allowed to muck around with it.[1]

All true. And just so. In any case, you want to hand over something that is identical to, but isn’t exactly the something that you were given. But it is exactly the same. For most purposes in this day and age that is fine, and indeed will support your title transfer analysis, should you be in the market for a true sale opinion.

Seeing as, in the case of dematerialised securities held in a clearing system (in other words all transferable securities) this is a rather arid ontological distinction at the best of times, but it is one must firmly in the front of one’s mind when considering fundamental tools of our trade — close-out netting, stock lending, rehypothecation (anything that involves a title transfer collateral arrangement really) — lest the whole intellectual superstructure of modern credit risk mitigation should collapse before your eyes.

Equivalent” isn’t just “similar”

You may come across someone (in OTC Clearing/CCP space) who wants to modify “equivalent” to mean not just fungible securities of the same Series/ISIN, but “similar ones” – same issuer, but different maturity, and under a different ISIN etc.

Resist this. It is likely to have arisen by way of misapprehension. In most master docs, “equivalent” is carefully defined to be exactly fungible [2]but at the gallop at which most collateral operations managers’ working days pass, they may have missed this, labouring instead under the illusion (based on its ordinary dictionary meaning) that “equivalent” allows redelivery of non-fungible securities of a “similar” type. They may even defend their misapprehension. “Yeah, they may protest, “but what if there’s some illiquidity in the market?”

But — well, you have that exact risk across your entire ISDA collateral book, so it’s a bit late. In practice, if there is a market disruption and you can’t get hold of the necessary collateral, as long as it doesn’t coincide with your own credit deterioration[3], you should be able to hash it out.

And if you are worried about it, go for a cash-only CSA — these days most are — or don’t allow potentially illiquid assets as collateral, or just don’t reuse that asset.

Now there may be a need for the “similar securities” concept in the OTC to CCP space that we haven’t yet divined, doubtful, but let’s say — but we should call that something else – perhaps “Similar Credit Support” – to differentiate it from “Equivalent Credit Support” which is still needed in the CSA to support the title transfer analysis.

See also


  1. Or, just as commonly and more innocuously, you held it in a dematerialised omnibus custody account, with fungible assets owned by other customers, and never did anything with it, but you still can’t tell whose bit is whose.
  2. See: 1995 English Law CSA: “Equivalent Credit Support”; Global Master Securities Lending Agreement: Equivalent; Global Master Repurchase Agreement: Equivalent.
  3. I mean, imagine.