CUA has increased the maximum loan-to-valuation ratio for new mortgage lending to investors from 70 per cent to 85 per cent for new to CUA customers. Established CUA customers and new customers bringing both owner-occupied and investor loans for refinance will be subject to a 95 per cent maximum LVR. CUA said it got its investor loan balance growth below ten per cent last year and has been winding back investor restrictions. One of the investigators into the big banks' alleged interest rate manipulation is a former Westpac bond trader. the Australian Financial Review reports. ASIC investigator Colin Luxford worked at Westpac from 2003 to 2005 before "an apparent disagreement" with the treasury unit of the bank led to his departure. Westpac is being used by ASIC for unconscionable conduct and market manipulation relating to the benchmark interest rate, the bank bill swap rate.