Z Energy was the worst performer, down 2.2 per cent to $7.72. A government-commissioned study released today has found New Zealand's fuel market "may not be consistent with a workably competitive market", with retail margins increasing over the past five years while more expensive petrol in the South Island and Wellington isn't explained by higher costs in those areas.
Energy and Resources Minister Judith Collins said she plans to ask the commerce minister whether the Commerce Commission should undertake a further study once it is legally empowered to do so, and that she has instructed her officials to assess the recommendations and report back to her by November.
"Z's been quite volatile today as a result of that, they got down to $7.60 so they have bounced but overall are still down," Kinnaird said. "It's really too early to tell what the impact is going to be on Z, but the market doesn't like uncertainty so until such time as we see more firm detail, which will be some time off, that will weigh over their price."
The study's main recommendation was for the government to look further into the issue, including contracts for independent firms to access terminals around the country and the reasonableness of prices. It also recommended potential changes including a registry which would prevent major companies from seeing their competitors' market shares and the possible creation of a liquid wholesale market.
New Zealand Refining, which operates the oil refinery at Marsden Point, was unchanged at $2.45.
CBL Corp dropped 1.5 per cent to $3.30, Fisher & Paykel Healthcare Corp fell 1.3 per cent to $11.08, and Summerset Group Holdings declined 1.1 per cent to $4.70.