MiniMax and Zhipu Debut in Hang Seng Tech Index: A Tale of Two AI Stocks on a Brutal Market Day

A Milestone Years in the Making

The Hang Seng Indexes Company had actually announced the inclusion on May 22, after its quarterly review . The two companies replaced Kingdee International and Kingsoft in the 30-constituent tech gauge, formally taking effect after the market close on June 5 and trading as official members starting June 8 . They were also added to the broader Hang Seng Composite Index, and Zhipu was simultaneously admitted to the Stock Connect programme, widening access for mainland Chinese investors .

This was more than just a quarterly rebalancing exercise. It was a direct response to months of criticism that Hong Kong’s primary technology benchmark had catastrophically missed the global AI boom . Throughout early 2026, the Hang Seng Tech Index had fallen more than 10% year-to-date, dramatically underperforming global peers . All the while, MiniMax and Zhipu—the two best-performing new listings in Hong Kong for 2026—were absent from the index simply because their January IPOs hadn't yet met the minimum listing-history requirement .

The Morgan Stanley Counterfactual: A 5-Percentage-Point Miss

That absence was costly for index trackers. In an April 2026 report, Morgan Stanley analysts calculated a stark counterfactual: had MiniMax and Zhipu been added to the Hang Seng Tech Index at their IPO, replacing the two smallest existing constituents, the gauge's year-to-date return would have been roughly 5 percentage points higher . Instead, investors in passive products tied to the index watched those AI gains from the sidelines.

The bank estimated that the two firms could eventually represent a combined 5% to 7% of the index, implying US$1.25 billion to US$1.75 billion in forced passive fund inflows as index-tracking vehicles rebalance . Ahead of the debut, Morgan Stanley raised its price targets: MiniMax to HK$1,100 from HK$990, and Knowledge Atlas Technology to HK$990 from HK$560—a dramatic 77% upward revision for the Zhipu parent .

Why Zhipu Gained While MiniMax Got Hit

The divergence on June 8 underscores how inclusion alone is not a stock-levitating magic wand. Several factors were in play:

• Dual catalyst for Zhipu: Zhipu’s concurrent inclusion in the Stock Connect scheme provided an extra layer of demand visibility, with mainland investors gaining access to the stock for the first time .
• MiniMax's heavier retail footprint: MiniMax's IPO in January 2026 had been oversubscribed by a staggering 1,209 times . That level of retail froth often creates a hair-trigger investor base prone to selling into macro-driven downturns.
• Passive inflows are slow-burn: Index-tracker rebalancing happens on a delayed schedule, meaning the anticipated billions in passive buying would be a gradual tailwind rather than a first-day catalyst capable of fighting the Fed-tightening narrative.

Analysts also flagged a risk that could blunt future gains: looming lock-up expirations on pre-IPO shares. A wave of insider selling hitting the market just as passive funds are forced to buy could create complex, choppy trading conditions in the months ahead .

A Seminal Moment, Whatever the Price Action

For all the first-day volatility, the addition of MiniMax and Zhipu rewires the DNA of Hong Kong’s benchmark tech gauge. For years, the index was dominated by Chinese internet-platform giants exposed to a maturing consumer economy. Now it includes companies that sell picks and shovels for the next productivity revolution .

The Hang Seng Tech Index's 2.7% drop on inclusion day may look like an inauspicious start, but the deeper story is the validation of AI as a durable public-market category in Asia. The market will now watch whether Morgan Stanley's projection of US$1.25 billion to US$1.75 billion in passive inflows acts as the floor that true blue-chip index membership is supposed to provide—or whether global rates are now the only chart that matters.