The country's four big Australian-owned banks have made handsome half year profits, raking in a combined $2.5 billion. That's 11 percent more than the same period a year ago. The country's largest bank ANZ, made $964 million for the six months to March, BNZ made $490 million. ASB, whose reporting period is a December half year, posted a $593 million profit. And on Monday, Westpac reported a $482 million profit. Susie Ferguson talks to Massey Business School's director of Academic Programmes Claire Matthews.