【明報專訊】SINCE last year, international oil prices have fluctuated like a rollercoaster ride. Just last week, they oscillated sharply. The causes have been complex, having to do with the pandemic and changes in energy policies, so they are difficult to be generalised. The US has proposed to release its national reserves to curb oil price rises and several countries including China have heeded the call. The crux of the matter, however, will be the decision made by the Organisation of Petroleum Exporting Countries (OPEC), Russia and other countries in meetings in a few days.