What is the share market Index in Singapore?

The Straits Times Index (STI) is a stock market index that tracks the performance of the top 30 companies listed on the Singapore Exchange (SGX). It is the most widely followed stock market index in Singapore and is often used as a barometer of the overall health of the Singapore stock market.

The STI was launched in 1966 with a base value of 100. Since then, it has grown significantly and has reached a record high of 3,948.76 on 21 April 2021.

The STI is a capitalization-weighted index, which means that the companies with the largest market capitalizations have a greater impact on the index than the companies with smaller market capitalizations. The STI is also a free-float-adjusted index, which means that only the freely tradable shares of a company are included in the index.

The STI is calculated by the SGX every 15 seconds during trading hours. The index is reviewed quarterly and the composition of the index is adjusted if necessary.

The STI is a popular investment benchmark for both institutional and retail investors. It is also used as a basis for futures and options contracts traded on the SGX.