![Hundreds of thousands are likely to see an increase in their interest costs.](/web/20161206040252im_/http://www.theage.com.au/content/dam/images/g/t/4/3/4/2/image.related.landscape.460x307.gt3zgp.png/1480936787602.jpg)
Westpac and NAB raise some interest rates, targeting investors
Westpac and National Australia Bank have both raised interest rates for key groups of home loan customers, as banks look to protect their profit margins by passing on higher funding costs.