Economists at our biggest bank expect the Reserve Bank will increase the Official Cash Rate.

ANZ's changed its forecast, now predicting 25 basis point hikes in February and in April.

That would take the OCR to six percent -- from its current 5.5.

ANZ chief economist Sharon Zollner told Heather du Plessis Allan that the Reserve Bank said it was very close to hiking it again in November.

She says since then, a series of small but consistent surprises suggest inflation will take long to get back to target.

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