The Straits Times Index, which is compiled by the newspaper of the same name, is Singapore�s premier equity index. Started in August of 1998, this index is comprised of 55 of the exchange�s most valuable firms. It is a modified value-weighted index, which is complicated in calculation, but ensures that the largest firms have the greatest impact on the index�s value. When taken together, the index's 55 components represent about 60% of the total market value of all issues traded on the Singapore Stock Exchange.

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Singapore Stock Exchange