The Government is taking aim at bank's massive profits by allegedly looking into open banking, with an announcement potentially coming this week.
Open banking is when you can move all your bank details, your debits, your mortgages etc between banks very quickly, creating high amounts of competition, as seen overseas.
The evidence shows that it brings banks profits down about 10 percent.
Associate professor at the Massey University Business School Claire Matthews joined Mike Hosking.
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