In today’s briefing:
- S&P/ASX Index Rebalance (Mar 2025): SIG Is the BIG One; Changes Galore Across Indices
- Quiddity ASX Mar25 Results: Multiple Surprises; High Short Buildup for DELs; Rare Successful Trade

S&P/ASX Index Rebalance (Mar 2025): SIG Is the BIG One; Changes Galore Across Indices
- There are 2 changes for the S&P/ASX50 Index, 2 changes for the S&P/ASX100 Index, 7 changes for the S&P/ASX200 Index and 11 adds/ 7 deletes for the S&P/ASX300 Index.
- There is a huge increase in the number of index shares for Sigma Healthcare (SIG AU), triggering passive buying of nearly A$1.4bn at the close on 21 March.
- The adds have outperformed the deletes across all indices. Positioning varies across stocks and there could be some big movers over the next few days.
Quiddity ASX Mar25 Results: Multiple Surprises; High Short Buildup for DELs; Rare Successful Trade
- The ADDs/DELs for the ASX index family for the March 2025 index rebal event were announced after market close on Friday 7th March 2025.
- There are 22 ADDs and 18 DELs collectively for ASX 50, ASX 100, ASX 200, and ASX 300.
- In this insight, we take a final look at the flow expectations for each of these index changes.
