Proprietary spot indexes -covering opaque over-the-counter markets –calculated by the Commodity Research Bureau since 1952
Illuminating OTC Price Aggregates
The Spot Market Price Index is a measure of price movements of 22 sensitive basic commodities whose markets are presumed to be among the first to be influenced by changes in economic conditions. As such, it serves as a forward-looking indicator of impending changes in business activity and price movement. Sub-indices for six major asset classes are calculated.