v09821_m, v09823_m - Hedging sets

In template C 34.03, the columns current market value (CMV), positive (c0050) and Current market value (CMV), negative (c0060) are to be presented on hedging set level and shall be determined by netting positive and negative market values of the transactions within one hedging set gross of any collateral held or posted.  In order to comply with requirements, the CMVs are to be presented on hedging set level. While this is possible for calculating each risk category (e.g. Equity risk (r0230, c0050, c0060), there is a potential issue with split of the given risk category into single- and multi-name transactions (e.g. for Equity risk: r0250, r0260, c0050, c0060). The hedging sets can contain both single and multi-name transactions. How to approach a possible situation where in an extreme case e.g. CMV on the hedging set can be positive, but all single name transaction-level MV are negative, therefore the positive CMV would actually be negative? Is it possible to calculate CMV splitting the hedging sets into single and multi-name hedging sub-sets, then determining the CMV on those hedging sub-sets? In this case, the netting of positive and negative market values will happen only within the hedging sub-sets.

Reporting instructions not clear on how to correctly interpret requirements for calculating and reporting CMV in context of single and multi-name transactions.