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BTX® - Bulgarian Traded Index

Indexlaunch: 28.03.2008

The BTX is a capitalization-weighted price index and is made up of the most liquid and highest capitalized stocks of Bulgarian Stock Exchange (BSE – Sofia). The index is calculated and disseminated real-time in BGN (Bulgarian Lev), EUR and USD. Designed as a tradable index BTX can be used as an underlying for structured products and for standardized derivatives (futures & options).


Short Code ISIN Bloomberg Reuters Calculation Time
BTX BGN  AT0000A03HB2 BTXGBN <Index> .BTXL CET 08:30 – 13:00
BTX EUR AT0000A03HC0 BTXEUR<Index> .BTXEUR CET 08:30 – 17:45
BTX USD AT0000A03HD8 BTXUSD  <Index> .BTXUSD CET 08:30 – 17:45


Main Features of the BTX:

  • The BTX is calculated Monday to Friday on every day that the BSE – Sofia is open for trading also case of an exchange holiday in Austria.
  • Dividend payments are not considered
  • The effective free float of a company is tracked by free float factors: 0.10 - 0.20 – 0.30 - 0.40 - 0.50 – 0.60 - 0.70 - 0.80 - 0.90 - 1.00.
  • Representation factors can take values between 0.01 and 1.00 and are used to avoid that an index member exceeds a maximum weighting cap of 25%.
  • Only traded prices from BSE are considered for the calculation of BTX. Block Trades or calculated prices will not be considered.
  • New index values are triggered by new traded prices in the index members (updates real-time) or by new exchange rates (updates every 2 minutes). The Bulgarian Lev is pegged to the Euro.
  • Quarterly review and adjustments of the calculation parameters
  • Revision and changes to the index composition on a semi-annual basis (March/ September)