Singapore’s SGX Indices has launch the iEdge Singapore Next 50 Indices, a move designed to enhance visibility and investor access to the next tier of large and liquid Singapore-listed companies, beyond the traditional Straits Times Index ( STI ) top 30.

The indices aim to capture market opportunities among the 50 most significant mainboard-listed firms that fall just outside the STI. And, built on a transparent and rules-based approach, they consider factors like free-float market capitalization and trading liquidity to determine inclusion.

Two versions of the index are available, one weighted by market cap, and the other by liquidity, providing investors with tools to gain exposure to companies rising in prominence but not yet part of the STI elite.

The initiative, SGX says, reflects the growing interest in mid-cap and emerging blue-chip companies, whose investor engagement has climbed markedly in 2025.

Notably, institutional investors have purchased a net S$425 million ( US$330.6 million ) in small- and mid-cap stocks over the first eight months of the year. Meanwhile, average daily turnover in this segment surged 50% to S$163 million, driven largely by retail participation.

The launch also aligns with SGX’s broader strategy to expand its suite of thematic and sustainable indices, including those tracking low-carbon and Reit ( real estate investment trust ) performance, reinforcing, it says, its commitment to innovation and investor diversity.

“The iEdge Singapore Next 50 Indices are part of our ongoing efforts to build a more vibrant and inclusive market ecosystem,” adds Ng Yao Loong, SGX Group’s head of equities. “By putting the spotlight on companies beyond the top 30, we aim to help investors capitalize on a broader range of opportunities.”