netting is clause in ISDA master agreement,stating in the event of a default,all transactions are considered as a single transaction,既one defaults,it must default on all transactions
without netting,the exposure is payoff from a portfolio of options
with netting:the exposure is payoff from an option on a portfolio
NRR=MAX(Vi求和,0)/Vi求和max(Vi,0){当前敞口的netting/without netting的当前敞口
CEA=max(当前敞口的netting,0)+(0.4+0.6*NRR)*未来敞口(对未来敞口做系数调整)