Index Rebal/Special Situations, Quiddity Advisors

Janaghan Jeyakumar, CFA

Index Rebal/Special Situations

Quiddity Advisors

Pan-Asia Catalysts/Events

Index Rebalance

<ul>
<li>In this insight, we take a look at the potential index changes for ASX 200, 100, 50, and 20 in the run-up to the December 2025 index rebal event.</li>
<li>We expect one change for ASX 50, one change for ASX 100, and four changes for ASX 200. </li>
<li>The official index changes will be announced after the close on Friday 5th December 2025.</li>
</ul>


In this insight, we take a look at the potential index changes for ASX 200, 100, 50, and 20 in the run-up to the December 2025 index rebal event.
We expect one change for ASX 50, one change for ASX 100, and four changes for ASX 200. 
The official index changes will be announced after the close on Friday 5th December 2025.


Quiddity Leaderboard ASX Dec25: Clear Signs of Pre-Positioning; Stay Away from the Crowds

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

Northern Star Resources / Index Rebalance

<ul>
<li>The <a href="https://www.smartkarma.com/entities/vaneck-gold-miners-etf-usa" target="_blank" data-smartkarma-citation="entities:32924:1" rel="noopener">VanEck Gold Miners ETF/USA (GDX US)</a> will change benchmark from the NYSE Arca Gold Miners Index to the MarketVector Global Gold Miners Index at the close on 19 September.</li>
<li>The differences in the constituents between the two indices should result in 8 adds and 25 deletes. Estimated one-way turnover is 27.4% resulting in a round-trip trade of US$12.5bn.</li>
<li>The forecast adds have continued to underperform the forecast deletes as the big valuation gap that had opened up since the announcement of the benchmark switch narrows.</li>
</ul>


The VanEck Gold Miners ETF/USA (GDX US) will change benchmark from the NYSE Arca Gold Miners Index to the MarketVector Global Gold Miners Index at the close on 19 September.
The differences in the constituents between the two indices should result in 8 adds and 25 deletes. Estimated one-way turnover is 27.4% resulting in a round-trip trade of US$12.5bn.
The forecast adds have continued to underperform the forecast deletes as the big valuation gap that had opened up since the announcement of the benchmark switch narrows.


Gold Miners ETF (GDX US): Further Capping Pushes Trade to Over US$12.5bn

Amman Mineral Internasional / Index Rebalance

<ul>
<li>The <a href="https://www.smartkarma.com/entities/vaneck-gold-miners-etf-usa" target="_blank" data-smartkarma-citation="entities:32924:1" rel="noopener">VanEck Gold Miners ETF/USA (GDX US)</a> will change benchmark from the NYSE Arca Gold Miners Index to the MarketVector Global Gold Miners Index at the close on 19 September.</li>
<li>We forecast 8 adds and 25 deletes for the ETF. Estimated one-way turnover is 15.77% resulting in a round-trip trade of US$6.18bn.</li>
<li>The forecast adds have outperformed the forecast deletes since the announcement of the benchmark switch and over shorter time frames too. The valuation gap has opened up.</li>
</ul>


The VanEck Gold Miners ETF/USA (GDX US) will change benchmark from the NYSE Arca Gold Miners Index to the MarketVector Global Gold Miners Index at the close on 19 September.
We forecast 8 adds and 25 deletes for the ETF. Estimated one-way turnover is 15.77% resulting in a round-trip trade of US$6.18bn.
The forecast adds have outperformed the forecast deletes since the announcement of the benchmark switch and over shorter time frames too. The valuation gap has opened up.


Gold Miners ETF (GDX US): Big Outperformance Driven by Benchmark Change; Valuation Gap Opens Up

Pan-Asia Catalysts/Events, Quiddity Advisors

Travis Lundy

<ul>
<li>The MV Global Gold Miners Index (GDX) represents the performance of large-cap and mid-cap gold and silver mining companies listed around the world.</li>
<li>This index is reviewed/rebalanced quarterly.  For September, there is a big increase in flow events as the VanEck Gold Miners ETF changes benchmark to the GDX Index.</li>
<li>There are a bunch of changes to go with the change in benchmark leading to US$5.8bn of two-way flows. It's a big deal. </li>
</ul>


The MV Global Gold Miners Index (GDX) represents the performance of large-cap and mid-cap gold and silver mining companies listed around the world.
This index is reviewed/rebalanced quarterly.  For September, there is a big increase in flow events as the VanEck Gold Miners ETF changes benchmark to the GDX Index.
There are a bunch of changes to go with the change in benchmark leading to US$5.8bn of two-way flows. It's a big deal. 


[Quiddity Index] Van Eck Gold Miners ETF (GDX) Sep25 Rebal - $5.8bn of Gold Stocks To Trade

<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

Australia

Resolute Mining Limited explores for, produces and develops gold in Mali and Queensland, Australia. The Company's gold exploration projects include Syama and Ravenswood.

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Resolute Mining (RSG AU)

Quiddity Leaderboard ASX Dec25: Clear Signs of Pre-Positioning; Stay Away from the Crowds

There are clear signs of positioning among some of the high-impact expected ADDs/DELs and staying away from such overcrowded bets might be a good...

Janaghan Jeyakumar, CFA

Gold Miners ETF (GDX US): Further Capping Pushes Trade to Over US$12.5bn

The GDX benchmark change is expected to result in 27.4% turnover and a US$12.5bn trade. Multiple days of ADV need to be traded in a lot of stocks....

Brian Freitas

Gold Miners ETF (GDX US): Big Outperformance Driven by Benchmark Change; Valuation Gap Opens Up

We see 8 adds and 25 deletes for GDX. Estimated one-way turnover is 15.77% and round-trip trade is US$6.18bn. Forecast adds have outperformed...

Brian Freitas

[Quiddity Index] Van Eck Gold Miners ETF (GDX) Sep25 Rebal - $5.8bn of Gold Stocks To Trade

The Van Eck Gold Miners ETF rebal in September comes with a change in benchmark which makes this a bigger deal than normal. That adds flows. We see...

Travis Lundy

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

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