The four "Carbon Family" indices primarily focus on leading listed companies aligned with the "dual carbon" development goals. However, due to their differing positioning, there are certain variations in concentration and top-weighted stocks.

From a concentration perspective, the CSI Shanghai Environment and Energy Exchange Carbon Neutrality Index and the CSI New Energy Index include a larger number of constituents—100 and 80, respectively—making them relatively more balanced. Their top 10 concentrations are slightly lower, at 49.2% and 47.5%, respectively. The other two indices, however, lean more toward deep low-carbon subsectors, each comprising 50 constituents, making them more focused. Their top 10 concentrations are slightly higher, at 56.5% and 59.3%, respectively.

Looking at the top 10 constituents, the overlap among the four "Carbon Family" indices is not high, reflecting their distinct positioning. The more balanced CSI Shanghai Environment and Energy Exchange Carbon Neutrality Index and CSI New Energy Index include heavyweight stocks such as CATL, Sungrow Power Supply, China National Nuclear Power, and LONGi Green Energy Technology—leading companies in new energy and power generation. In contrast, the CSI Green Power Index and the SZSE New Energy Battery Index show no overlap in their top 10 constituents, though they share 2-3 stocks with the other two more balanced indices. This highlights their stronger thematic focus and greater specialization in niche sectors.

Thus, the four indices have distinct characteristics. The CSI Shanghai Environment and Energy Exchange Carbon Neutrality Index is more comprehensive, with a balanced industry distribution, and its top 10 constituents are all leading companies with large market capitalizations across various sectors. The CSI New Energy Index also has strong comprehensiveness but leans more toward deep low-carbon sectors, including leading companies like TBEA and Tongwei in its top 10. In comparison, the SZSE New Energy Battery Index and the CSI Green Power Index are more specialized, with their top 10 constituents reflecting a sharper focus on niche industries.