[1] Following a major sectoral re-classification of listed companies by the Singapore Exchange, which saw the removal of the "industrials" category, the STI replaced the previous Straits Times Industrials Index (abbreviation: STII) and began trading on 31 August 1998 at 885.26 points, in continuation of where the STII left off.

At the time, it represented 78% of the average daily traded value over a 12-month period and 61.2% of total market capitalisation on the exchange.

[3] One such review, for instance, raised the number of stocks from 45 to 50, which took effect when trading resumed on 18 March 2005.

This change reduced the index representation of the average daily traded value to 60%, while increasing its total market capitalisation to 75%.

The family tree of the FTSE ST Index Series:[1] The creation of the FTSE ST Index Series was intended to facilitate the creation of financial products such as institutional and retail funds, exchange-traded funds (ETFs), derivatives contracts and other index-linked products.