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>The September rebalance of the Hang Seng family of indices will use today's closing prices to cap the index constituent weights.  </li>
<li>The net round-trip trade across all stocks across the five indices is estimated at HK$57.55bn (US$7.4bn). There is size to trade in a lot of stocks.</li>
<li>
<a href="https://www.smartkarma.com/entities/alibaba-group-holding-ltd-d7b798e2-202d-4e01-9a1e-799e2ae8f0c7" target="_blank" data-smartkarma-citation="entities:28434:1" rel="noopener">Alibaba (9988 HK)</a> has flipped from a net buy to a net sell following its huge rally yesterday.</li>
</ul>


The September rebalance of the Hang Seng family of indices will use today's closing prices to cap the index constituent weights.  
The net round-trip trade across all stocks across the five indices is estimated at HK$57.55bn (US$7.4bn). There is size to trade in a lot of stocks.

Alibaba (9988 HK) has flipped from a net buy to a net sell following its huge rally yesterday.


HSI, HSCEI, HSTECH, HSIII Index Rebalance: US$7.4bn of Flows Post Capping (Sep 2025)

<ul>
<li>There is 1 add and 21 deletions for the Hang Seng Biotech Index (HSHKBIO Index) at the September rebalance.</li>
<li>Estimated one-way turnover at the rebalance is 11.25% resulting in a round-trip trade of HK$1.77bn (US$226m).</li>
<li>The deletes have underperformed the HSHKBIO Index since the start of the year with the gap opening up over the last two months following the announcement of the methodology change.</li>
</ul>


There is 1 add and 21 deletions for the Hang Seng Biotech Index (HSHKBIO Index) at the September rebalance.
Estimated one-way turnover at the rebalance is 11.25% resulting in a round-trip trade of HK$1.77bn (US$226m).
The deletes have underperformed the HSHKBIO Index since the start of the year with the gap opening up over the last two months following the announcement of the methodology change.


Hang Seng Biotech Index Rebalance: 1 Add & 21 Deletes as Methodology Changes

<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

Index Rebal/Special Situations, Quiddity Advisors

Janaghan Jeyakumar, CFA

Index Rebal/Special Situations

Quiddity Advisors

Pan-Asia Catalysts/Events

<ul>
<li>The Hang Seng Biotech Index (HSHKBIO) represents the largest biotech companies listed in Hong Kong (HKEX) from September 2025.</li>
<li>We expect 20 index constituents to face deletion in September 2025 rebal due to a recent change in index selection methodology.</li>
<li>The index changes will be announced after the close on Friday 22nd August 2025.</li>
</ul>


The Hang Seng Biotech Index (HSHKBIO) represents the largest biotech companies listed in Hong Kong (HKEX) from September 2025.
We expect 20 index constituents to face deletion in September 2025 rebal due to a recent change in index selection methodology.
The index changes will be announced after the close on Friday 22nd August 2025.


Quiddity Leaderboard Hang Seng Biotech Sep25: Announcement Soon; MANY DELs Likely!

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 analyze the weekly Hong Kong Connect flows with our data engine for holding position as of August 15th.</li>
<li>The top stocks by inflows and outflows were tabulated for all market, HSCEI, mid cap and s/mid cap groups.</li>
<li>We highlight flows for Xiaomi, Kuaishou, Wuxi Biologics, Alibaba, BYD Electronic, Anta, China Mobile, China Life, Zai Lab.</li>
</ul>


We analyze the weekly Hong Kong Connect flows with our data engine for holding position as of August 15th.
The top stocks by inflows and outflows were tabulated for all market, HSCEI, mid cap and s/mid cap groups.
We highlight flows for Xiaomi, Kuaishou, Wuxi Biologics, Alibaba, BYD Electronic, Anta, China Mobile, China Life, Zai Lab.


HK Connect Flows Weekly (Aug 15th): Xiaomi, Kuaishou, Wuxi Biologics, Alibaba, BYD Electronic, Anta

China

Specializes in the research, development, manufacture, and sale of artificial joint prostheses & their associated surgical instruments and applications

Price Gauge
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AK Medical Holdings Limited (1789 HK)

HSI, HSCEI, HSTECH, HSIII Index Rebalance: US$7.4bn of Flows Post Capping (Sep 2025)

The Sep rebalance of the HSI, HSCEI, HSTECH, HSIII, HSHKBIO indices will use today's closing prices for capping. The round-trip trade across the...

Brian Freitas

Hang Seng Biotech Index Rebalance: 1 Add & 21 Deletes as Methodology Changes

There is 1 add and 21 deletes for the HSHKBIO in Sep. Couple of surprises. Estimated one-way turnover at the rebalance is 11.25% resulting in a...

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 Hang Seng Biotech Sep25: Announcement Soon; MANY DELs Likely!

There are 20 deletions expected due to drastic changes to the index selection methodology. These names have underperformed the index in the last...

Janaghan Jeyakumar, CFA

HK Connect Flows Weekly (Aug 15th): Xiaomi, Kuaishou, Wuxi Biologics, Alibaba, BYD Electronic, Anta

We analyzed southbound Hong Kong connect flows in the past week and highlighted flows for Xiaomi, Kuaishou, Wuxi Biologics, Alibaba, BYD...

Ke Yan, CFA, FRM

Price Gauge

52-week Range

Market Cap (USDm)

P/E

Dividend (Yield)