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China's STAR50 tech index plunges 40% in four-month selloff

China's STAR50 tech index plunges 40% in four-month selloff

Money Moves

$480 billion erased from Shanghai's AI-heavy index as valuations compress

Yesterday: STAR Market plunge confirmed as AI selloff deepens

Overview

Updated 1 hour ago

The STAR50 index, which tracks 50 of the largest technology and chip companies on Shanghai's STAR Market, has fallen 40% in less than four months. The slide erased about $480 billion in market value from stocks that had become the centerpiece of Beijing's AI push.

The broader Chinese market has lost roughly $2.4 trillion since May, and the blue-chip CSI300 index sits about 20% below its June high. AI-related stocks had grown to 42% of China's total market capitalization, so the reversal hit a wide swath of investors.

Why it matters

If the selloff deepens, Beijing loses its main channel for directing household savings into AI development, and China's tech ambitions slow.

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Key Indicators

40%
STAR50 decline from June peak
Index fell 40% in less than four months, closing at 1,315.50 on Oct 26.
$480 billion
Market value erased from STAR50 stocks
Combined market capitalization of index constituents since the June high.
~100x
STAR50 trailing price-to-earnings ratio
Down from nearly 250x at the peak; the Nasdaq 100 trades at about 30x.
$2.4 trillion
Total Chinese market value lost since May
Across all mainland-listed A-shares and Hong Kong H-shares.

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People Involved

DB
Dong Baozhen
Beijing-based fund manager
Watching the selloff from the sidelines
LW
Leo Wang
Partner at Qianchuang Capital
Criticizing index composition distortions
WQ
Wu Qing
Chairman, China Securities Regulatory Commission
Under pressure to stabilize markets

Organizations Involved

China Securities Regulatory Commission
China Securities Regulatory Commission
Federal Agency
Regulating the market amid the selloff

China's top securities regulator, responsible for overseeing the nation's stock exchanges and listed companies.
SS
Shanghai Stock Exchange STAR Market
Stock Exchange Segment
Center of the selloff

The Science and Technology Innovation Board (STAR Market), launched in 2019 to fund China's tech sector.
Morgan Stanley
Morgan Stanley
Investment Bank
Predicting further downside

Global investment bank whose analysts cover Chinese equity markets.

Timeline

2024 October 2026

8 events Latest: Yesterday
Tap a bar to jump to that date

  1. STAR Market plunge confirmed as AI selloff deepens

    Latest Market

    Reports confirm STAR50 down 40% in under four months; broad Chinese markets down $2.4 trillion since May.

  2. STAR50 closes at 1,315.50, down 2.23%

    Market

    Index extends losses, confirming a 40% decline from its June peak and $480 billion in erased value.

  3. CSRC tightens IPO standards for robot companies

    Regulation

    Regulator informally tells industry that humanoid robot firms must show revenue, not just prototypes, to list.

  4. Physical AI investment falls 40% in a month

    Market

    Investment in China's physical AI sector drops from 19.4 billion to 11.6 billion yuan between August and September.

  5. Unitree lists with 8,000x retail oversubscription

    Market

    Robot-maker Unitree IPOs with shares 8,000 times oversubscribed by retail buyers; stock later halves.

  6. Chipmakers MetaX and Moore Threads halve

    Market

    Two AI chip companies that had surged 700% and 400% on debut lose half their value from July highs.

  7. STAR50 peaks at extreme valuations

    Market

    Index hits its high with AI stocks trading at roughly 250x trailing earnings and comprising 42% of China's market cap.

  8. Stimulus promises ignite a two-year rally

    Market

    Economic stimulus announcements send Chinese tech stocks soaring, starting a two-year bull run.

Scenarios

1

STAR50 drops another 15% as selloff deepens

Possible Resolves by Apr 30, 2027

Discussed by: Morgan Stanley analysts (via SCMP)

Morgan Stanley warns Chinese stocks could lose another 15% as the AI unwind continues. With STAR50 still trading at roughly 100x trailing earnings — more than three times the Nasdaq 100's multiple — institutional buyers see room for further compression. US restrictions on Chinese data-center equipment would accelerate the decline.

2

STAR50 stabilizes near current levels

Possible Resolves by Q1 2027

Discussed by: Hong Hao, Lotus Asset Management; Asia funds overall remain overweight on China

Valuations reach levels institutional buyers accept, and state-backed funds step in to cushion further falls. The CSI300 has already corrected about 20%, which historically has marked the end of Chinese market corrections. Fund managers like Hong Hao note the selloff is a natural correction, not a fundamental breakdown.

3

Beijing announces market support measures

Possible Resolves by Q2 2027

Discussed by: Analysts noting state funds were sellers during the rally; market participants at CSRC meetings

If the decline accelerates toward bear-market territory, Beijing could respond with state fund buying, an IPO moratorium, or trading curbs — tools it used after the 2015 crash. The CSRC's October meetings with market participants suggest regulators are already weighing options. Support measures could slow the decline but may not reverse it.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

March 2000 - October 2002

Dot-com crash (2000-2002)

The Nasdaq Composite peaked in March 2000 with internet companies trading at triple-digit earnings multiples on retail speculation. When earnings failed to materialize, the index fell roughly three-quarters over the next two years, wiping out trillions in market value.

Then

Most dot-com companies went bankrupt. Surviving firms saw share prices fall 80% or more before stabilizing.

Now

The Nasdaq took nearly 15 years to regain its 2000 peak. The crash reset expectations about what internet companies were really worth.

Why this matters now

Like China's STAR50, the dot-com rally was driven by retail enthusiasm and a belief that any company in a hot sector would grow forever. The question is whether China's AI suppliers have revenue to justify current multiples — or whether the parallel extends to the aftermath.

June - August 2015

China's 2015 stock market crash

The Shanghai Composite more than doubled in the first half of 2015 on margin-funded speculation, then fell about 40% in two months after regulators moved to curb leverage. Beijing deployed state funds and banned large shareholder sales to stem the collapse.

Then

State intervention stabilized the market, but millions of retail investors lost heavily. Margin calls forced further selling.

Now

The crash led to years of regulatory tightening and a reputation for volatility that Beijing has struggled to shake.

Why this matters now

The 2015 pattern — a government-encouraged retail boom ending in sharp reversal — closely mirrors today's AI stock story. Beijing's push for a 'slow bull' market was meant to prevent a repeat; the STAR50 selloff suggests it may have failed.

Sources

(6)
Reuters The Guardian South China Morning Post Silicon Report Seoul Economic Daily Decrypt