The prices of major petroleum products — petrol and high speed diesel (HSD) — are estimated to go down by Rs2 to Rs3 per litre with effect from Nov 1 for a fortnight, after a minor reduction in global prices. Informed sources said the average prices of petrol and HSD decreased in the international market by about $1.5 and $2.5 per barrel, respectively, in the last fortnight. Depending on final