Services and infrastructure in Christchurch have been seriously affected by this morning's quake. Here is the current situation.

State owned energy company Genesis Energy has reported a better than forecast net profit after tax for the year of $69 million.

Meridian Energy's underlying earnings rose 29 per cent in the year to June 30 to $251.9 million, reflecting a 13 per cent increase in total energy generation.

Pressure on electricity supplies will grow unless a way is found to control telecommunications' energy appetite.

Mark Solomon and Ngai Tahu have embraced the notion of investing in SOEs, writes Graeme Hunt.

Many countries are moving ahead with smart-grid technology, but New Zealand is lagging a little way behind.