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SET Index

SET Index

The SET Index is a composite index calculated from stock prices of all common shares on the main board. It is a market capitalization weighted price index which compares the current market value of all listed common shares with the value on a base date of April 30, 1975, when the SET Index was established and set at 100 points. Its calculation is adjusted in line with new listings, delistings, and capitalization changes in order to eliminate other effects which are beyond price movement from the index.

Sectoral Indices

Sectorial indices are calculated from the prices of common shares in each sector. The calculation method is the same as that of the SET Index.

SET50 Index

The SET50 Index was launched on June 17, 1996 to accommodate the issuing of index futures and index options as well as to provide a benchmark for measuring performance of mutual funds investing in the SET. The Index is a market capitalization weighted price index calculated from the share prices of the top 50 listed companies on the SET, with large market capitalization and high liquidity using a base date of August 16, 1995. The list of component stocks in the SET 50 Index is revised every six months

SET100 Index

From May 3, 2005 onwards, the SET has launched the new Index, the SET100. The Index is a market capitalization weight price index calculated from the share prices of the top 100 listed companies on the SET, applying the same criteria as SET50, using the base date of April 29, 2005 with the beginning of 1,000 points. The list of stocks in the SET100 Index is revised every six months.