POSB Bank Singapore is part of DBS bank since 1998. It offers mortgages for Singapore residential properties.
One of its mortgage, Perfect 8, (used to be Perfect 10) is available for HDB flats. It is the only loan with a guaranteed cap of interest rates for 8 (no longer 10) years. The maximum interest rate for the first 8 years will be 0.1% lower than the HDB concessionary rate. For refinancing customers only, they will receive cash rebate of up to $1,800.