In recent years, HDB resale volume has been declining in the aftermath of various government cooling measures like the Mortgage Servicing Ratio (MSR) and capping of the loan term for HDB loans. Arising from these policies, there have been cases of negative HDB sales. What is exactly negative HDB sales? It means that after you sold your HDB flat, the resale price is sufficient to pay off the outstanding HDB or bank loan but not enough to repay fully the CPF refund with accrued interests. In this situation, besides having no cash proceeds from the transaction, you may even require to top up the shortfall in cash to your CPF account if your property is sold below market value. According to CPF rule, there is also a difference for those owners who bought HDB flats with HDB ......