问题如下：
Riggs Resources, LLC, (Riggs) is a commodity trading firm. Riggs has numerous trades outstanding with several counterparties; however, it is concerned with presettlement risk. In order to reduce presettlement risk (the risk that Riggs's counterparties would default before settlement), it would be most beneficial for Riggs to:
选项： have payment netting.
have close-out netting.
C.analyze potential losses as the sum of exposures.
D.have netting but not set-off.
解释：
B To minimize presettlement risk, Riggs should have close-out netting. Under close-out, contracts between solvent and insolvent counterparties are terminated and netted.
Payment netting would reduce settlement and operational risk, but not presettlement risk. Netting also means individual positive exposures are nonadditive. The terms netting and set¬off are synonymous.
payment netting里面的payment 是指什么？netting but not set-off里面的 set-off是什么意思？
