Template:Csa credit support amount calculation: Difference between revisions

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===Calculating your {{csaprov|Credit Support Amount}}===
===Calculating your {{csaprov|Credit Support Amount}}===
How the {{csaprov|IA}} contributes to the {{csaprov|Credit Support Amount}} — being the amount of credit support in total that one party must have given the other at any time<ref>As opposed to the amount required to be transferred ''on that day'', considering the “{{csaprov|Credit Support Balance}}” the {{csaprov|Transferee}} already holds — that’s the {{csaprov|Delivery Amount}} or {{csaprov|Return Amount}}, [[as the case may be]].</ref> can be mind-boggling.  
===={{csa}}====
How the {{csaprov|IA}} contributes to the {{csaprov|Credit Support Amount}} — being the amount of credit support in total that one party must have given the other at any time<ref>As opposed to the amount required to be transferred ''on that day'', considering the “{{csaprov|Credit Support Balance}}” the {{csaprov|Transferee}} already holds — that’s the {{csaprov|Delivery Amount}} or {{csaprov|Return Amount}}, [[as the case may be]].</ref> under the {{csa}} can be mind-boggling.  


It pans out for a {{csaprov|Transferee}} like so:
It pans out for a {{csaprov|Transferee}} like so:
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*Any {{csaprov|Threshold}} that applies to the {{csaprov|Transferor}} - being the Exposure which triggers its [[variation margin]] obligation in the first place.<br />
*Any {{csaprov|Threshold}} that applies to the {{csaprov|Transferor}} - being the Exposure which triggers its [[variation margin]] obligation in the first place.<br />


This leaves you with a formula for a {{csaprov|Transferee}}’s {{csaprov|Credit Support Amount}} as follows: '''''Max[0, E + IA<sub>t</sub> - (IA<sub>r</sub> + Threshold.)'''''
This leaves you with a formula for a {{csaprov|Transferee}}’s {{csaprov|Credit Support Amount}} as follows: '''''Max[0, (E + IA<sub>t</sub> - (IA<sub>r</sub> + Threshold)].'''''
====Example====
====Example====
Let’s plug in some numbers. Say:
Let’s plug in some numbers. Say:
*{{csaprov|Transferee}}’s {{csaprov|Exposure}} is 10,000,000
*The {{csaprov|Transferee}}’s {{csaprov|Exposure}} is 10,000,000
*The {{csaprov|Transferor}}’s {{csaprov|Independent Amount}} IA<sub>t</sub> is 2,000,000
*The {{csaprov|Transferor}}’s {{csaprov|Independent Amount}} IA<sub>t</sub> is 2,000,000
*The {csaprov|Transferee}}’s {{csaprov|Independent Amount}} IA<sub>r</sub> is 0
*The {{csaprov|Transferee}}’s {{csaprov|Independent Amount}} IA<sub>r</sub> is 0
*The {{csaprov|Transferor}}’s {{csaprov|Threshold}} is 5,000,000
*The {{csaprov|Transferor}}’s {{csaprov|Threshold}} is 5,000,000


Your {{csaprov|Credit Support Amount}} is therefore ''10,000,000 + 2,000,000 - (0 + 5,000,000) = '''7,000,000'''''.  
Your {{csaprov|Credit Support Amount}} is therefore ''10,000,000 + 2,000,000 - (0 + 5,000,000) = '''7,000,000'''''.  


Now, whether you have to ''pay'' anything or ''receive'' anything as a result — whether there is a {{csaprov|Delivery Amount}} or a {{csaprov|Return Amount}}, in other words — that depends whether the {{csaprov|Credit Support Amount}} is greater or smaller than your prevailing {{csaprov|Credit Support Balance}}, by at least the {{csaprov|Minimum Transfer Amount}}. <ref>
Now, whether you have to ''pay'' anything or ''receive'' anything as a result — whether there is a {{csaprov|Delivery Amount}} or a {{csaprov|Return Amount}}, in other words — that depends whether the {{csaprov|Credit Support Amount}} is greater or smaller than your prevailing {{csaprov|Credit Support Balance}}, by at least the {{csaprov|Minimum Transfer Amount}}.  
===={{vmcsa}} with no [[IA]] amendment====
Since the {{vmcsa}} assumes there is no Independent Amounts and no Thresholds, it is quite a lot easier. It is just the Exposure. So much so, that there isn't even a concept of the Credit Support Amount under the {{vmcsa}}, unless you have retrofitted one, and who in their right mind would do that?
 
Oh.
 
You have, haven’t you. You’ve gone and co-opted the {{vmcsaprov|Credit Support Amount (VM/IA)}} concept in your Paragraph 11 annex, haven’t you.
 
===={{vmcsa}} with a customised [[IA]] amendment====
Never mind. Well, just for you, the formula is a sort of half-way house: Under this unholy bastardisation of a {{vmcsa}}, a {{csaprov|Transferee}}’s {{csaprov|Credit Support Amount}} will be: '''''Max[0, (E + IA<sub>t</sub> - (IA<sub>r</sub>)].)'''''
<ref>