Oil prices on rollercoaster ride as world watches Vienna

A meeting of oil producers takes place next week and the outcome will have a profound impact on the global economy, writes Kyran FitzGerald

It is the gift that keeps on giving as far as the global economy is concerned.

Oil prices have declined by 30% on peak levels reached in June. Last Friday, Brent oil traded at a four-year low at just below $80 a barrel.