OVERVIEW

On 29/09/2026, the Ho Chi Minh Stock Exchange (HOSE) announced the restructuring of its index ground rules with the aim of standardizing the rulebook framework. The two principal changes are as follows:

1. Restructuring the index ground rules: A two-tier framework comprising the Ground Rules for HOSE Equity Indices, which apply to all indices, and the Index-Specific Ground Rules, which set out provisions specific to each index.
2. Unifying the periodic review schedule: All indices managed by HOSE will share the same Data cut-off Date, Announcement Date and Effective Date under the Ground Rules for HOSE Equity Indices, depending on each quarterly review.

Overall, the restructuring makes index information more consistent and easier to look up, and does not materially affect the criteria for selecting stocks into the indices. The biggest change is that the Announcement Date is pushed back by about 2 weeks compared with the previous rules; as the interval between the Announcement Date and the Effective Date remains unchanged, the Effective Date is also pushed back by about 2 weeks.