Questions are swirling about the potential implications of KiwiBank becoming privatised

National's deputy leader Nicola Willis has expressed interest in possibly selling off the New Zealand-owned bank.

It comes only a couple of years after the previous Government secured complete state ownership for 2.1 billion dollars.

Victoria University's Martien Lubberink says a new owner coming in could majorly reorganise KiwiBank's operations.

He says if KiwiBank focuses on more risky activities - it could affect financial stability and possibly exclude some people from lending.