Get online all commodity prices and live mcx market prices, spot market prices, live gold-silver price/rate in India, crude oil price here. Just as Indian stocks are traded on the BSE and NSE stock exchange, commodities like gold, silver, crude oil, copper and food grains are traded on MCX and NCDEX exchange. An index of commodity prices is a ratio which measures a change in the yield relative to a base. Indexes can be weighted or weighted value prices. Commodity Price Index is a weighted average of the prices for selected products. Such selective products believed to constitute the commodities market.