Brokers may be steering interest-only mortgage surge

The proportion of interest only loans from banks is climbing steadily, reaching 42.5 per cent in the September 2014 quarter, up from 35 per cent early last year.

APRA's quarterly data on ADI property exposures shows the shifting mix in loans advanced across the banking sector.

The Reserve Bank of Australia has warned that lending practices such as interest only loans indicated risks to banks were increasing.

A second risk factor noted by the RBA - loans with loan to valuation ratios of more than 90 per cent - may be easing.

Loans of this type represented 12 per cent of new business in September down from 15 per cent in early 2013.

The proportion of loans originated for banks through third parties is also climbing steadily, reaching 43.2 per cent in the September 2014 quarter up from 38 per cent in early 2013.