New Zealand shares edged up in light trading as the lead-up to the end of the June financial year has investors waiting on earnings updates. Genesis Energy gained as the power company's thermal assets look set to insulate it from low hydro-lake levels, while Heartland Bank followed the Australian banks lower.
The S&P/NZX 50 Index increased 32.36 points, or 0.4 per cent, to 7516.35. Within the index, 27 stocks gained, 14 fell and nine were unchanged. Turnover was $121.2 million in a day when 11 stocks reported more than 1 million shares changing hands.
Genesis Energy rose 1.3 per cent to $2.345, near a record-high $2.38 it set earlier this month. The electricity generator-retailer is expected to benefit from the low hydro-lake levels in the South Island, meaning its rivals may have to buy its thermal energy in the wholesale market to meet retail demand.
"There might be some underlying support, particularly because of the listed gen-tailers it has a lot more exposure to thermal," said James Smalley, a director at Hamilton Hindin Greene in Christchurch. "Playing in the back of investors' minds is that people are very positive about the recent gas acquisition it made."
Among other power companies, Meridian Energy gained 1.4 per cent to $2.95, Mercury NZ increased 0.3 per cent to $3.27 and Contact Energy advanced 0.6 per cent to $5.14.