Derivatives and Quantitative Strategist

Gaudenz Schneider

Equity Derivatives

<ul>
<li>September brings heavy index rebalancing activity. <a href="https://www.smartkarma.com/entities/pop-mart-international-group-l" target="_blank" data-smartkarma-citation="entities:29016:1" rel="noopener">Pop Mart (9992 HK)</a> will join both the <a href="https://www.smartkarma.com/entities/hong-kong-hang-seng-index" target="_blank" data-smartkarma-citation="entities:22899:1" rel="noopener">Hang Seng Index (HSI INDEX)</a> and the <a href="https://www.smartkarma.com/entities/hang-seng-china-enterprises-index" target="_blank" data-smartkarma-citation="entities:22900:1" rel="noopener">Hang Seng China Enterprises Index (HSCEI INDEX)</a>.</li>
<li>
The Fed is widely expected to cut rates and Asia-Pac peers (BoJ, RBA, RBI) are also meeting.</li>
<li>
Why Read: Plan ahead and take into account known market events when making investment and trading decision.</li>
</ul>


September brings heavy index rebalancing activity. Pop Mart (9992 HK) will join both the Hang Seng Index (HSI INDEX) and the Hang Seng China Enterprises Index (HSCEI INDEX).

The Fed is widely expected to cut rates and Asia-Pac peers (BoJ, RBA, RBI) are also meeting.

Why Read: Plan ahead and take into account known market events when making investment and trading decision.


Index Changes and Rate Cuts: Key Events in September 2025

Pan-Asia Index Rebalances/ Events/ Delta One, Periscope Analytics

Brian Freitas

Pan-Asia Index Rebalances/ Events/ Delta One

Periscope Analytics

Periscope Analytics focuses on event-driven trades across Asia Pacific and provides comprehensive, timely and systematic coverage of index changes to major Asia Pacific indices in a structured manner.

The analysis includes forecasted inclusions and exclusions to all major Asian indices that have significant amount of tracking assets, including estimates of passive buy/sell flow on the stocks. The service also provides commentary and impact of market consultations, ground rule changes, and other events (IPOs, spin-offs, M&A) that could lead to index changes and passive flow.

Periscope Analytics works with multi-strategy hedge funds, proprietary trading firms, stat arb trading groups and long-only investors that invest and trade in the Asia Pacific region with the data being used to trade index rebalances, avoid pre-positioning and passive flow, and to time entry into and exit from stocks.

Event-Driven Trades Across Asia Pacific

Index Rebalance

<ul>
<li>S&amp;P DJI have proposed methodology changes to the S&amp;P/ASX family of indices to enhance representativeness and more quickly reflect changing market conditions. The consultation conclusions could be announced next week.</li>
<li>The updated methodology could lead to 51 changes across the family of indices with implementation on 19 September. There will be a large impact on a number of stocks.</li>
<li>The forecast adds have outperformed the forecast deletes over the last several months and near-term performance has been spectacular for the <a href="https://www.smartkarma.com/entities/s-p-asx-200" target="_blank" data-smartkarma-citation="entities:22901:1" rel="noopener">S&amp;P/ASX 200 (AS51 INDEX)</a> and S&amp;P/ASX 300 Index changes.</li>
</ul>


S&amp;P DJI have proposed methodology changes to the S&amp;P/ASX family of indices to enhance representativeness and more quickly reflect changing market conditions. The consultation conclusions could be announced next week.
The updated methodology could lead to 51 changes across the family of indices with implementation on 19 September. There will be a large impact on a number of stocks.
The forecast adds have outperformed the forecast deletes over the last several months and near-term performance has been spectacular for the S&amp;P/ASX 200 (AS51 INDEX) and S&amp;P/ASX 300 Index changes.


S&P/​​​​​​​​​ASX Index Rebalance Preview (Sep 25): Potential Changes if Methodology Is Updated

<ul>
<li>S&amp;P DJI have proposed methodology changes to the S&amp;P/ASX family of indices to enhance representativeness and more quickly reflecting changing market conditions.</li>
<li>The main changes are lowering the minimum float threshold, shortening the market cap calculation period and the liquidity calculation period, and including buffers for additions and deletions.</li>
<li>We currently forecast 47 changes to the S&amp;P/ASX family of indices in September and the short market cap computation period could lead to more change over the next two months.</li>
</ul>


S&amp;P DJI have proposed methodology changes to the S&amp;P/ASX family of indices to enhance representativeness and more quickly reflecting changing market conditions.
The main changes are lowering the minimum float threshold, shortening the market cap calculation period and the liquidity calculation period, and including buffers for additions and deletions.
We currently forecast 47 changes to the S&amp;P/ASX family of indices in September and the short market cap computation period could lead to more change over the next two months.


S&P/ASX Indices: Proposed Methodology Changes & The BIG September Rebalance

Index Rebal/Special Situations, Quiddity Advisors

Janaghan Jeyakumar, CFA

Index Rebal/Special Situations

Quiddity Advisors

Pan-Asia Catalysts/Events

<ul>
<li>In this insight, we take a look at the potential index changes for ASX 300, 200, 100, 50, and 20 in the run-up to the September 2025 index rebal event.</li>
<li>Currently, a market consultation is being conducted and there could be several significant changes made to the index selection process.</li>
<li>The official index changes will be announced after the close on Friday 5th September 2025.</li>
</ul>


In this insight, we take a look at the potential index changes for ASX 300, 200, 100, 50, and 20 in the run-up to the September 2025 index rebal event.
Currently, a market consultation is being conducted and there could be several significant changes made to the index selection process.
The official index changes will be announced after the close on Friday 5th September 2025.


Quiddity Leaderboard ASX Sep25: Exp ADDs Down Vs Exp DELs Since Methodology Change; Time to Reverse?

Pan-Asia Tactical Market Calls (Quant-Driven), MRM Research

Nico Rosti

Pan-Asia Tactical Market Calls (Quant-Driven)

MRM Research

Quantitative Research

<ul>
<li>The <a href="https://www.smartkarma.com/entities/s-p-asx-200" target="_blank" data-smartkarma-citation="entities:22901:1" rel="noopener">S&amp;P/ASX 200 (AS51 INDEX)</a> has suffered a continuous sell-off for the past 3 weeks. The index is deeply oversold, our model predicts an imminent reversal.</li>
<li>The reversal could lift the index to the 8091-8208 price area, but the index may start to fall again after that.</li>
<li>As posted by <a href="https://www.smartkarma.com/profiles/brian-freitas" target="_blank" data-smartkarma-citation="accounts:4091" rel="noopener">Brian Freitas</a> there has been 7 changes for the <a href="https://www.smartkarma.com/entities/s-p-asx-200" target="_blank" data-smartkarma-citation="entities:22901:1" rel="noopener">S&amp;P/ASX 200</a> (index rebalance), read his insight for further details on this.</li>
</ul>


The S&amp;P/ASX 200 (AS51 INDEX) has suffered a continuous sell-off for the past 3 weeks. The index is deeply oversold, our model predicts an imminent reversal.
The reversal could lift the index to the 8091-8208 price area, but the index may start to fall again after that.
As posted by Brian Freitas there has been 7 changes for the S&amp;P/ASX 200 (index rebalance), read his insight for further details on this.


Australia

Nuix Pty Ltd operates as atechnology company. The Company offers software platform for indexing, searching, analyzing, and extracting knowledge from unstructured data that includes digital investigation, cybersecurity, e-Discovery, information governance, and email migration and privacy. Nuix serves customers worldwide.

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Nuix Limited (NXL AU)

Index Changes and Rate Cuts: Key Events in September 2025

September packs in index rebalances, quarterly expiries, central bank calls, and Fed drama—keeping markets busy amid a light holiday calendar.

Gaudenz Schneider

S&P/ASX Index Rebalance Preview (Sep 25): Potential Changes if Methodology Is Updated

The review period for the September rebalance is done and the proposals in the market consultation will be implemented. That means a lot of change...

Brian Freitas

S&P/ASX Indices: Proposed Methodology Changes & The BIG September Rebalance

The market consultation ends in 2 weeks, and the conclusions should be announced soon after that. A lot of the stocks have moved significantly over...

Brian Freitas

Quiddity Leaderboard ASX Sep25: Exp ADDs Down Vs Exp DELs Since Methodology Change; Time to Reverse?

We believe the newly proposed methodology would be implemented during the September 2025 index review. The expected ADDs have been underperforming...

Janaghan Jeyakumar, CFA

S&P/ASX 200 Index Outlook Post-Rebalance

The recently rebalanced ASX 200 index is in oversold territory. Our model predicts an imminent reversal and relief rally to the 8091-8208 range,...

Nico Rosti

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Market Cap (USDm)

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Index Changes and Rate Cuts: Key Events in September 2025

September packs in index rebalances, quarterly expiries, central bank calls, and Fed drama—keeping markets busy amid a light holiday calendar.

Gaudenz Schneider

S&P/​​​​​​​​​ASX Index Rebalance Preview (Sep 25): Potential Changes if Methodology Is Updated

The review period for the September rebalance is done and the proposals in the market consultation will be implemented. That means a lot of change...

Brian Freitas

S&P/ASX Indices: Proposed Methodology Changes & The BIG September Rebalance

The market consultation ends in 2 weeks, and the conclusions should be announced soon after that. A lot of the stocks have moved significantly over...

Brian Freitas

Quiddity Leaderboard ASX Sep25: Exp ADDs Down Vs Exp DELs Since Methodology Change; Time to Reverse?

We believe the newly proposed methodology would be implemented during the September 2025 index review. The expected ADDs have been underperforming...

Janaghan Jeyakumar, CFA

S&P/ASX 200 Index Outlook Post-Rebalance

The recently rebalanced ASX 200 index is in oversold territory. Our model predicts an imminent reversal and relief rally to the 8091-8208 range,...

Nico Rosti

S&P/ASX Index Rebalance Preview (Sep 25): Potential Changes if Methodology Is Updated