Optimism is rising among businesses - largely driven by construction. 

ANZ's October business outlook has business confidence up five points on 66, in a 10-year high. 

Meanwhile, the proportion of businesses feeling they're faring well, has climbed to -11 in the highest point since March. 

Chief economist Sharon Zollner says it boils down to interest rates. 

She says fewer construction firms say they're not busy than a year ago - and she explained conditions are tough, but things are starting to look up a little.

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