Mark Riggall: Milford Asset Management portfolio manager on the difficulties impacting several Kiwi businesses - Heather du Plessis-Allan Drive

Several Kiwi businesses are feeling the impacts of a tougher economic climate as they report their earnings.

Significant cost inflation and rising interest rates have impacted demand, and New Zealand's biggest companies aren't immune to the associated cost challenges.

Milford Asset Management portfolio manager Mark Riggall says it's gotten harder for businesses to offset input prices with consumer demand.

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