mai Index Series

mai Index
mai Industry Group Index

mai Index


mai Index represents the price movement that reflects all common stocks trading on the Market for Alternative Investment (mai). It is a composite index.

Calculation formula

mai Index =
Current Market Value x 100
Base Market Value

Index Type Composite Index
Calculation Methodology

mai Index calculations are in line with the calculation methodology used by SET Index:

  • Using market capitalization-weighted method
  • Calculating from the prices of all common stocks listed on mai
  • Excluding stocks that have been suspended for more than one year
Base value adjustment 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, such as fund-raising to public offerings, conversion from preferred to common stock, or exercising warrants, including the shifting of stocks from mai’s market to SET's main market, in order to eliminate all effects other than price movements from 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 as underlying products to create a range of index-linked products such as tracker funds, structured products, ETF, etc. Any person interested in launching these products have to apply for approval and pay the license fee to SET.  For more information, please contact Information Services Department via tel. 0 2229 2491 or email: .



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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