ANZ is speculating interest rates will drop lower than previously expected - as the economy is predicted to need extra help to recover.

The bank believes the OCR will bottom out at 2.5 percent, down from the 3 percent low that was previously predicted.

ANZ chief economist Sharon Zollner says it's likely the Reserve Bank will give the economy an additional 'push in the back' to help boost a recovery.

"It's too soon to make any concrete judgements on what might happen to our commodity prices or anything like that - but it does seem pretty likely that some pretty full-on uncertainty is going to persist for quite a long time." 

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