BANGKOK: Thailand 50 Index (SET50) is the index of the top 50 largest companies listed on the Stock Exchange of Thailand (SET) in Bangkok. Including Electricity Generating Authority Of Thailand- North Bangkok Power Plant Block 1 Infrastructure Fund shares. SET50 has its broader sibling called SET100, which tracks the top 100 largest stocks on SET. Both SET50 and SET100 are market capitalization-weighted indices and they draw their components from SET Index, which tracks all the common stocks listed on the SET.SET50 and SET100 were also developed to facilitate trading in index futures and options. As such, SET50 is an investible index.
SET50 was first published in August 1995 with the base value being set at 1000 points. The index sank to an all-time low of 636.07 points in October 2011 at a time when the global economy was just begin to recover from the aftermath of the worst financial meltdown in recent memory. However, SET50 shot back up in the next few years, hitting a lifetime high of 1079.78 in May 2013 as investor confidence strengthened amid strong returns by Thai companies.
But a stock dropped from SET50 may still continue listing on the broader SET100index.
The constituents of SET50 represent various sectors. Energy, Construction materials and Transportation are the top three largest sectors in the index.
Trading on SET rolls out in five sessions lasting between a few minutes and several hours. The morning pre-opening session starts at 9.30 a.m. and ends between 9.55 a.m. and 10.00 a.m. This pre-opening session is used to determine the open price for the regular morning session.
The regular morning session begins at 9.55 a.m. or 10.00 a.m., depending on when the pre-opening session ended, and runs until 12.30 p.m. at which the market takes a lunch break.
The last session on SET is the afterhours trading that starts immediately the regular afternoon session ends at 16.30 p.m. and runs for 30 minutes to 40 minutes.