The market was looking for a reason to buy copper again and the strikes were a perfect excuse.

The Chinese have just added to the nervousness of a market that was already nervous. This market is flying on vapor now.

The fundamentals have become superfluous. None of the metals would be where they are today without the influence of fund buying.

The market continues to be pushed about on relatively thin volumes.

The market continues to be supported from a fundamental perspective by a combination of falling stocks and supply disruptions.

In recent months we have seen a whole different type of fund come in. Myself and a number of my colleagues who have been in this business for years have never seen anything like this.

It is too early to say whether this is the end of the beginning or the beginning of the end.

They're suspended on a system of ropes, so catch the waste before it reaches the seabed. As we harvest them, they're tested to see how much of the waste nutrients they're absorbing. The seaweed is there to absorb dissolved nutrients and the shellfish to dispose of particles.

There are good fundamental reasons that mean copper prices won't come down in the near term. A series of potential supply disruptions have not resulted in the loss of much metal, but with stocks falling at a time when demand usually picks up, no one will (sell) it.

We've long been aware of the environmental responsibilities you've got when you're in this kind of business. We only feed the salmon shrimp meal, and as far as stocking density's concerned, only one per cent of the volume of the cage is fish.