mai Index

This Index represents the price movement for all common stocks trading on the Market for Alternative Investment (mai).


mai Index =
Current Market Value x 100
Base Market Value

Index Type Composite Index
Calculation Methodology
  • The mai Index is a market capitalization weighted index, relying on the same calculation methodology as that of the SET Index.
  • Calculated from the prices of all common stocks listed on the mai.
  • Excluded are stocks that have been suspended for more than one year.
Base value adjustment
The mai Index calculation is adjusted in line with modifications in the values of stocks resulting from changes in the number of stocks due to various events, e.g., public offerings, exercised warrants, conversions of preferred to common shares, or the shifting of stocks from the mai’s main market to SET's main market, in order to eliminate all effects other than price movements from the mai Index.
Base value 100 points
Base date September 2, 2002


Download Document
File Type
mai Index Methodology

Licenses for product creation

SET indices can be used to create a range of index-linked products (Tracker funds, structured products, ETF, etc.) Such product creation is subject to approval by SET and licensing fee. Please inquire our Information Services Department ( Email:) for more information.



SET Index, SET50 Index, SET100 Index and all indices calculated by the Stock Exchange of Thailand ( “SET” ) (collectively called "SET Index Series" ) are the registered trademarks/service marks solely owned by, and proprietary to SET. Any unauthorized use of SET Index Series is strictly prohibited. All information provided is for information purposes only and no warranty is made as to its fitness for purpose, satisfactory quality or otherwise. Every effort has been made to ensure that all information given is accurate, but no responsibility or liability (including in negligence) can be accepted by SET for errors or omissions or for any losses arising from the use of this information.

mai market overview  
Listed Companies in mai  
SET Index Series Brochure  
    SET Index Series Brochure  


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