Finance Brokerages raise concern over PSBs' appetite to buy lower-rated pool assets Updated : December 12, 2019 01:57 PM IST Under partial credit guarantee scheme, PSBs are allowed to purchase BBB+ or higher rated assets from NBFCs, and HFCs Validity of the partial credit guarantee scheme may be extended by up to three months taking into account its progress. Under the scheme, earlier PSBs were allowed only to purchase only AA-rated assets from these companies. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.