Why Hong Kong's Stock Exchange Is Building Its Own China Index

A stock exchange is a toll booth: it gets paid when you trade, not when you think. So it is worth pausing on the fact that the company that runs Hong Kong's stock exchange, the main door between mainland China's companies and global capital, has gone into the index business. In November 2024, Hong Kong Exchanges and Clearing (HKEX) and index firm Hang Seng Indexes jointly launched the Hang Seng HKEX Stock Connect China Enterprises Index — 80 of the largest Chinese companies in the Stock Connect universe, the pipeline that lets mainlanders buy Hong Kong stocks and foreigners buy mainland ones.

Why would a place that charges by the trade care about a number it publishes? Because an index is not a report. It is a product machine. You cannot trade the index, but you can trade anything built on top of it — an ETF, a future, an option — and every one of those products needs the underlying companies to be actually buyable. The neat trick of this particular index is that all 80 names are reachable through Stock Connect. It is basically the old flagship China benchmark, the Hang Seng China Enterprises Index, which follows Chinese companies listed in Hong Kong, with the biggest mainland-listed A-shares bolted on, curated so that a fund manager can genuinely hold every ingredient.

That matters because an index nobody can trade is a press release, and a press release does not pay. An index that products can be built on is licensing revenue, plus derivatives volume, plus clearing fees. Which brings us to the deepest toll booth joke in finance: the people who own the roads under the roads are the index companies — MSCI, S&P, FTSE Russell, and, in Hong Kong, the Hang Seng Indexes arm. They trade nothing and publish a number, and they get paid every time anyone issues an ETF or a derivative against it.

The odd thing about HKEX is that it has always been on the paying side of that relationship. When you trade a Hang Seng Index future or an MSCI China A-share future on its market, HKEX is renting someone else's yardstick, paying a license fee for the privilege of letting you trade. The new China Enterprises index flips the direction: it is the first index co-branded by HKEX and its index partner, with the exchange's name right on the benchmark. It follows the same logic as HKEX's December 2025 Tech 100, the first Hong Kong equity index the company owns itself, which it promptly licensed to mainland manager E Fund to build an ETF. Own the benchmark, collect the license fee, and the products come to trade on your own cash and derivative markets: pay once for the number, pay again for the trade.

The nicest institutional detail is who the co-brand partner is. Hang Seng Indexes Company is a wholly owned subsidiary of Hang Seng Bank, and as of January 2026 Hang Seng Bank is itself wholly owned by HSBC, which just finished privatizing the lender it had long controlled. So the exchange on which Hang Seng Bank's own shares traded until they were delisted in that privatization is now co-publishing its China benchmark with the index arm of a global mega-bank. The toll booth is writing the yardstick together with one of its tenants.

Here is what all of this actually buys. HKEX is itself a listed company worth around $67 billion, and it just reported record first-half 2026 results: revenue of HK$16.7 billion (about US$2.1 billion), up 19% from a year earlier, and profit after tax up 24% to HK$10.6 billion. The interesting part of the record is what powered it — trading, and unusually equities, which topped 50% of revenue. That is precisely the concentration that CEO Bonnie Chan has spent her tenure trying to dilute; she wants HKEX to be a big player in bonds, currencies, commodities, and indices rather than a one-market shop. Index and data revenue is the natural counterweight: licensing fees are recurring, high-margin, and do not care whether August is quiet. And a successful benchmark becomes a small engine of turnover over time — exchange-traded products already supplied about 17% of headline average daily turnover in the first half of 2026, up from roughly 5% in 2021.

The honest check on the enthusiasm is that this particular index is still mostly promise. Two Novembers on, I have not found a listed future, option, or ETF tracking it. The payoff only lands if someone actually builds products on the yardstick, and benchmark traction is a years-long fight against incumbents — MSCI China, FTSE China, the existing HSCEI futures and options suite — that have decades of habit behind them. The design clearly says "products, please": 80 liquid, Connect-eligible giants with balanced sector representation. Whether the products arrive is an execution question, not a mechanism question. And it may not need to win big to be worth it for HKEX: every index it co-owns is one less license fee paid to someone else and one more product family that ends up on its own tapes.

Two things to take from this. If you get your China exposure through index products, this is a new all-investable China benchmark — the reason it exists is that both sponsors sell things built on numbers, not on views, and an investable everything-benchmark is what product desks actually want. And if you think of HKEX as an investment, an exchange collecting more than half its revenue from equity trading volume is a leveraged bet on how busy Chinese markets are, which is exactly why its management keeps minting indices: it is trying to make its own weather instead of renting it from MSCI. The market will tell you whether this yardstick earns its keep only when there is a product on it. Until then, it is a well-engineered product machine with nothing plugged in.