Global technology markets have been bullish this year while Hong Kong’s flagship tech gauge has lurched sideways. The Hang Seng Tech Index sank to roughly 5,100 on February 27th, more than 23% below its October peak and over 53% beneath its 2021 high. At the same time Tokyo and Seoul have been enjoying robust rallies; the Nikkei and KOSPI benchmarks have posted double‑digit gains year‑to‑date, underscoring a divergence that has confounded investors who long assumed China’s big tech names would move in step with regional peers.
The conventional explanations—currency moves, tighter external liquidity and domestic regulation—only partly account for the malaise. A more awkward reason is the rise of an unlisted domestic behemoth: ByteDance. The company that built Douyin (the China version of TikTok) now commands such enormous consumer attention and advertiser budgets that it is effectively reordering China’s digital economy without ever having to offer shares to retail investors in Hong Kong or Shanghai.
Douyin’s scale, by the metrics being circulated in the market, is breathtaking. Estimates put Douyin’s 2025 revenue near RMB901.2 billion, with advertising accounting for a sizable slice; daily active users are said to exceed 850 million and average daily usage near two hours. Those numbers help explain why global and domestic advertisers are reallocating spend—and why ad revenue forecasts for legacy heavyweight platforms such as Tencent and Alibaba look comparatively modest.
ByteDance’s inroads extend beyond advertising. Goldman Sachs and other market observers estimate ByteDance’s e‑commerce gross merchandise volume last year rivalled or exceeded some established incumbents, and the firm is moving fast into generative AI, hardware and system‑level integrations. The public launch of Seedance 2.0, a video‑generation model that went viral in February, crystallised the shift: an unlisted company shipping breakthrough AI can change competitive dynamics for listed rivals overnight.
That disruption has coincided with idiosyncratic market mechanics. When Seedance 2.0 launched on February 12th, a tentative rebound in the Hang Seng Tech Index vanished, and some large listed names—most notably Alibaba and Tencent—saw higher short interest and renewed selling pressure. Market participants began to joke about ways of expressing negative views on the index without being able to buy ByteDance shares, and some trading flows appear to have amplified volatility.
There is also a regulatory and political dimension to the mismatch between ByteDance’s market power and its unlisted status. A public listing would be complicated by data‑security scrutiny, geopolitics around TikTok, and the company’s mixed shareholder base of international private equity, venture capital and some Chinese institutional capital. VIE structures and cross‑border ownership remain politically sensitive in a year when regulators are scrutinising exactly how internet platforms manage data and national security risks.
Those political and technical hurdles are compounded by the fact that ByteDance’s governance and ownership are increasingly global in character. High‑profile secondary sales of small legacy stakes have pushed implied valuations into the high‑hundreds of billions of dollars, reinforcing the sense that a huge tranche of China’s digital value is not accessible to public‑market investors. For holders of index funds and Hong Kong‑listed tech equities, that is more than an abstract accounting problem: it is a structural risk to index relevance and future returns.
The near‑term consequences are obvious. Indices that cannot easily absorb large, fast‑growing new entrants can lose investor interest and price discovery. Over the medium term the options are predictable but unpalatable: ByteDance lists, for example in Hong Kong, restoring index parity; the government or regulators create new ways for domestic investors to share in private gains; or incumbents fight back successfully in AI and commerce. Each path carries political and market trade‑offs.
For international investors, the episode is a reminder of the blunt intersection between corporate strategy, geopolitics and public markets in China’s tech sector. The pace of AI innovation means disruption will keep coming; whether Hong Kong’s equity ecosystem can adapt will depend as much on regulatory choices as on ByteDance’s own decisions about where, if ever, to sell shares publicly.