In another effort to boost home ownership, the Singapore government sells the HDB flats at about 30% discount to the prevailing market prices. In addition, it has delinked BTO flat prices with the prices of more expensive resale flats since 2011, thereby keeping BTO flats affordable amid a rising property market. Furthermore, HDB sets the permissible Debt Servicing Ratio15 for BTO flats within the affordability benchmarks of 30%-35%.