The OMX Tallinn (OMXT) is the main stock market index in Estonia.[1] It reflects changes in the prices of shares listed in the main and investor lists of the Estonian Stock Exchange, and the Tallinn Stock Exchange.[2] It uses the Paasche Index Formula. The value of the index was calibrated to 100 on 3 June 1996. Before 2005 the index was known as TALSE.[1]