Credit Union Australia will curtail, or pause, writing new loans for property investors altogether, the Financial Review reports.CUA acting CEO Philip Fraser told the newspaper that the Brisbane-based mutual was forced to take action after internal modelling showed that the lender would soon exceed the ten per cent cap on investor loan growth set by APRA in December 2014.Other mutual banks may be perilously close to, or even beyond, this cap, although interpretation of public domain data from APRA in its monthly banking statistics is a sensitive issue. "We have observed an increase in new investor applications in response to some of the actions taken by other lenders to slow their investor growth," Fraser told the AFR."Without steps to quickly slow our investor lending growth, we anticipate CUA would reach the ten per cent benchmark within the next couple of months."Chief executive Rob Goudswaard told Banking Day last month that an increase in new lending and sales in recent months should contribute to a positive second-half financial performance, but one channel is this flow is now cut off.Goudswaard said then that "loans are flying through at the moment because we haven't raised our interest rates - but at the same time cost of funds have gone up."