Cash Collateral derivative

Variation margin cash collateral( received by custodian)gets 0% haircut to compute exposure at default (EAD) of collateralized Derivatives. Now if there is a sweep in option available where collateral custodian sweeps in the cash to money markets securities (for earning interest), will the collateral still be eligible for 0% haircut or should the haircut applicable for money market instruments to be used for exposure determination?