Index Rebal/Special Situations, Quiddity Advisors

Janaghan Jeyakumar, CFA

Index Rebal/Special Situations

Quiddity Advisors

Pan-Asia Catalysts/Events

Index Rebalance

<ul>
<li>The HSTECH Index tracks the performance of the top 30 technology companies listed in Hong Kong that have high business exposure to certain technology themes.</li>
<li>In this insight, we take a look at the potential index changes and the resultant capping flows for HSTECH index rebal event in December 2025.</li>
<li>We expect one index change for the HSTECH index in December 2025 based on the latest available data.</li>
</ul>


The HSTECH Index tracks the performance of the top 30 technology companies listed in Hong Kong that have high business exposure to certain technology themes.
In this insight, we take a look at the potential index changes and the resultant capping flows for HSTECH index rebal event in December 2025.
We expect one index change for the HSTECH index in December 2025 based on the latest available data.


Quiddity Leaderboard HSTECH Dec25: One Index Change Likely; US$650mn One-Way with Capping

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

<ul>
<li>There are no constituent changes for the <a href="https://www.smartkarma.com/entities/hang-seng-tech-index" target="_blank" data-smartkarma-citation="entities:31367:1" rel="noopener">Hang Seng TECH Index (HSTECH INDEX)</a> in September. However, there are float and capping changes.</li>
<li>Estimated one-way turnover is 6.3% leading to a round-trip trade of HK$31.1bn (US$4bn). There is plenty to buy in <a href="https://www.smartkarma.com/entities/horizon-robotics-inc" target="_blank" data-smartkarma-citation="entities:35637:1" rel="noopener">Horizon Robotics (9660 HK)</a>, <a href="https://www.smartkarma.com/entities/byd-co-ltd-h" target="_blank" data-smartkarma-citation="entities:20962:1" rel="noopener">BYD (1211 HK)</a> and <a href="https://www.smartkarma.com/entities/meituan" target="_blank" data-smartkarma-citation="entities:26970:1" rel="noopener">Meituan (3690 HK)</a>. </li>
<li>Short interest is elevated in some of the stocks with large flows and shorts could be active in the stocks over the next couple of weeks.</li>
</ul>


There are no constituent changes for the Hang Seng TECH Index (HSTECH INDEX) in September. However, there are float and capping changes.
Estimated one-way turnover is 6.3% leading to a round-trip trade of HK$31.1bn (US$4bn). There is plenty to buy in Horizon Robotics (9660 HK), BYD (1211 HK) and Meituan (3690 HK). 
Short interest is elevated in some of the stocks with large flows and shorts could be active in the stocks over the next couple of weeks.


HSTECH Index Rebalance: No Constituent Changes; Float/Capping Changes Lead to US$4bn Trade

<ul>
<li>Hang Seng Indexes announces changes to 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</a>, <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</a>, <a href="https://www.smartkarma.com/entities/hang-seng-tech-index" target="_blank" data-smartkarma-citation="entities:31367:1" rel="noopener">Hang Seng TECH Index</a>, HSIII Index, HSHKBIO Index and HSCI Index post market close tomorrow.</li>
<li>The net round-trip trade across the stocks is estimated to be HK$54.3bn (US$6.9bn) with big impact in a lot of names.</li>
<li>The largest inflows will be in <a href="https://www.smartkarma.com/entities/geely-automobile-holdings-ltd" target="_blank" data-smartkarma-citation="entities:127:1" rel="noopener">Geely Auto</a> if added to the <a href="https://www.smartkarma.com/entities/hang-seng-tech-index" target="_blank" data-smartkarma-citation="entities:31367:1" rel="noopener">HSTECH</a>, <a href="https://www.smartkarma.com/entities/pop-mart-international-group-l" target="_blank" data-smartkarma-citation="entities:29016:1" rel="noopener">Pop Mart</a> if added to the <a href="https://www.smartkarma.com/entities/hang-seng-china-enterprises-index" target="_blank" data-smartkarma-citation="entities:22900:1" rel="noopener">HSCEI</a> and <a href="https://www.smartkarma.com/entities/hong-kong-hang-seng-index" target="_blank" data-smartkarma-citation="entities:22899:1" rel="noopener">HSI</a>, and <a href="https://www.smartkarma.com/entities/horizon-robotics-inc" target="_blank" data-smartkarma-citation="entities:35637:1" rel="noopener">Horizon Robotics</a> due to a FAF increase.</li>
</ul>


Hang Seng Indexes announces changes to the Hang Seng Index, Hang Seng China Enterprises Index, Hang Seng TECH Index, HSIII Index, HSHKBIO Index and HSCI Index post market close tomorrow.
The net round-trip trade across the stocks is estimated to be HK$54.3bn (US$6.9bn) with big impact in a lot of names.
The largest inflows will be in Geely Auto if added to the HSTECH, Pop Mart if added to the HSCEI and HSI, and Horizon Robotics due to a FAF increase.


Hang Seng Indexes: Announcement Tomorrow; Potential Changes & Updated Flows

<ul>
<li>The HSTECH Index tracks the performance of the top 30 technology companies listed in Hong Kong that have high business exposure to certain technology themes.</li>
<li>The official index changes and indicative weights for the September 2025 index rebal event will be announced after the close on Friday 22nd August 2025.</li>
<li>We continue to expect one low-conviction index change for September 2025 and we estimate there to be capping flows of ~US$2.2bn one-way.</li>
</ul>


The HSTECH Index tracks the performance of the top 30 technology companies listed in Hong Kong that have high business exposure to certain technology themes.
The official index changes and indicative weights for the September 2025 index rebal event will be announced after the close on Friday 22nd August 2025.
We continue to expect one low-conviction index change for September 2025 and we estimate there to be capping flows of ~US$2.2bn one-way.


Quiddity Leaderboard HSTECH Sep25: GEELY up 15% Vs Peers; ~US$2.2bn One-Way; Announcement Soon

Asia Pac ECM and Index Rebal, Shenton Research

Ke Yan, CFA, FRM

Asia Pac ECM and Index Rebal

Asia Pac IPO & Placement Research, China Biotech

DZT Research

DZT Research is an independent Asia Pacific equity specialist. Our quantitative research covers index rebalancing flows, alongside exchange data analytics accross Asia Pacific. On the equity capital markets side, we focus on Asia Pacific ECM, especially biotech and TMT. Our lead analyst is frequently cited by international media.

Quantitative Analysis

<ul>
<li>We analysed the earning revision of component stocks of HS TECH in the past month.</li>
<li>We tabulated stocks with the top impact on index's EPS, stocks' EPS revision, and revenue revision.</li>
<li>We highlighted EPS revision on Ntes - S, Jd, Bidu, Meituan, Li Auto, Hua Hong Semi, Kingdee Int'L.</li>
</ul>


We analysed the earning revision of component stocks of HS TECH in the past month.
We tabulated stocks with the top impact on index's EPS, stocks' EPS revision, and revenue revision.
We highlighted EPS revision on Ntes - S, Jd, Bidu, Meituan, Li Auto, Hua Hong Semi, Kingdee Int'L.


HS TECH Index Earning Revision (Jul): Ntes, Jd, Bidu, Meituan, Li Auto, Hua Hong Semi

Hong Kong

ASMPT designs and manufactures machines and tools for the semiconductor and electronics assembly industries, including deposition, wafer separation, die attach, wire bonding, and advanced packaging solutions. It is a leading global supplier of hardware, software, and service solutions for intelligent factories, and also offers smart factory and intralogistics solutions. The company was founded in 1975 and is headquartered in Singapore.

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ASMPT (522 HK)

Quiddity Leaderboard HSTECH Dec25: One Index Change Likely; US$650mn One-Way with Capping

AAC Technologies could replace ASMPT in the HSTECH index in December 2025. This could trigger one-way flows of US$650mn including capping.

Janaghan Jeyakumar, CFA

HSTECH Index Rebalance: No Constituent Changes; Float/Capping Changes Lead to US$4bn Trade

No constituent changes, but some large FAF/capping changes. Estimated one-way turnover is 6.3% and round-trip trade is US$4bn. Large inflows for...

Brian Freitas

Hang Seng Indexes: Announcement Tomorrow; Potential Changes & Updated Flows

Hang Seng announces after market close on Friday. The net round-trip trade across the stocks is estimated at HK$54.3bn. There is positioning in the...

Brian Freitas

Quiddity Leaderboard HSTECH Sep25: GEELY up 15% Vs Peers; ~US$2.2bn One-Way; Announcement Soon

Our expected ADD Geely has outperformed peers by nearly 15% in two months. We continue to see this as a low-conviction expected ADD and we expect...

Janaghan Jeyakumar, CFA

HS TECH Index Earning Revision (Jul): Ntes, Jd, Bidu, Meituan, Li Auto, Hua Hong Semi

We analyzed HS TECH's consensus for Jul 2025 and highlighted changes of EPS in Ntes - S, Jd, Bidu, Meituan, Li Auto, Hua Hong Semi, Kingdee Int'L.

Ke Yan, CFA, FRM

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