May I ask one question on FVA discount under the exposure approach? Say, we price a trade under OIS discounting, and obtain the future EE, then we compute FVA as,
FVA = Sum ( DiscountFactor * EE * Funding Spread * Accrual Factor )
What "DiscountFactor" should be used here? "OIS" ? Or "OIS + Funding Spread"?