The Global Energy Innovation Index (GEIX), is designed as a currency-neutral way of monitoring quoted companies in renewable energy and energy technology. The GEIX consists of the 50 largest companies quoted on the world's major stock markets which derive half of their value from activities in renewable energy or low-carbon energy technology. The market capitalization of the index on 1 January, 2005 was USD 14.0 billion. It is stated that GEIX constituents and weightings are updated quaterly.
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