How can material divergences between the value of cash and collateral be managed in a documented sell/buy-back?

In a documented sell/buy-back transaction, market fluctuations can cause significant divergences between the value of the collateral securities and the cash provided. To eliminate or manage these discrepancies, parties can use either margin maintenance (transferring margin securities or cash) or re-pricing (terminating the existing transaction and creating a new one at current market prices). While both mechanisms are legally permitted under repo market documentation such as the ICMA GMRA Annex I, re-pricing is traditionally and most commonly used for sell/buy-backs. In contrast, margin maintenance is the standard mechanism preferred in classic repos. Therefore, divergences in sell/buy-backs can be managed using either method, but usually through re-pricing.

Option A: Margin maintenance is possible, but it is not the only method nor the most common method used specifically in sell/buy-back transactions.

Option C: Margin maintenance is standard in classic repo transactions, whereas re-pricing is the predominant method used in sell/buy-backs.

Option D: Re-pricing is the most common method, but margin maintenance is also allowed under standard documentation, making Option D incomplete.

- International Capital Market Association (ICMA), Global Master Repurchase Agreement (GMRA), Annex I: Sell/Buy-Back Transactions.

- ACI Financial Markets Association, ACI Dealing Certificate Syllabus, Topic 4: Repo and Stock Lending.