New Zealand shares were mixed yesterday, with as many gaining stocks as decliners on the NZX 50 Index. Port of Tauranga rose after posting record first-half earnings while Fletcher Building extended its decline after profit missed its guidance.

Vector profits for the first half of the financial year rose 6.9 per cent, despite revenue growth of just 0.8 per cent.

Profits for the first half of the year have slumped at Contact Energy, the stock exchange's largest energy company.

New Zealand shares fell, led by foodmaker Goodman Fielder and Australian lender Westpac after they posted results that disappointed some investors.