interest rate margin meaning in English

利率差距

Overheating in the residential mortgage market , combined with widespread cutting of interest rate margins as competition intensified , prompted the hkma to write to authorized institutions again in july to remind them of the need to continue to adopt a prudent and responsible attitude to their property lending . institutions were also reminded that they should strictly apply existing criteria , e . g
有见及住宅按揭市场过热，再加上竞争白热化，令息差普遍收窄，金融管理局遂于七月去信认可机构，嘱咐它们要继续对物业贷款采取审慎和负责的态度，并严格遵守现行有关按揭成数和偿债率等方面的准则。