Between June and August 2015, China's Shanghai Composite Index fell 45% — wiping $5 trillion in market value. The crash exposed the dangers of margin-fuelled retail speculation, the limits of government market intervention, and the growing interconnectedness of Chinese and global financial markets.
The Bubble: Government-Encouraged Speculation
The Chinese government actively encouraged stock market participation in 2014–2015 as a way to recapitalise state-owned enterprises and give households an alternative to property investment. State media ran articles encouraging citizens to buy stocks. Margin lending exploded — retail investors borrowed heavily to buy shares.
The Shanghai Composite rose 150% between June 2014 and June 2015. At its peak, Chinese retail investors were opening 4 million new brokerage accounts per week. The market was trading at 70× earnings — clearly in bubble territory.
The Crash and Government Intervention
The crash began in mid-June 2015. As prices fell, margin calls forced liquidations, which pushed prices lower, triggering more margin calls — the same feedback loop seen in 1987. The government's response was unprecedented: it banned major shareholders from selling, ordered state funds to buy stocks, and suspended trading in over half of all listed companies.
Despite these interventions, the market continued to fall. The government's visible hand in the market — and its inability to stop the decline — damaged confidence further.
Global Contagion: "Black Monday" August 24, 2015
On August 24, 2015 — dubbed "Black Monday" — Chinese markets fell 8.5% in a single session. The contagion spread globally: the Dow Jones fell 1,000 points at the open (its largest intraday point drop at the time), European markets fell 5%, and commodity prices collapsed.
The episode demonstrated that China's financial markets, despite being partially closed to foreign investors, had become systemically important to global markets. A Chinese sneeze could now give the world a cold.
Lessons for Emerging Market Investors
The 2015 crash illustrated several enduring lessons for emerging market investing: government-encouraged speculation creates the most dangerous bubbles; margin lending amplifies crashes; and government intervention in markets, while sometimes stabilising, can also create moral hazard and delay necessary corrections.
China's stock market has remained volatile and largely disconnected from economic fundamentals. The A-share market is dominated by retail investors (80%+ of trading volume) who trade on momentum and sentiment rather than fundamentals — creating persistent opportunities for disciplined contrarian investors.
✅ Key Takeaways
- Shanghai Composite rose 150% in 12 months before falling 45% in 3 weeks
- Government-encouraged margin lending created the bubble
- China banned selling and suspended half of all stocks — but the market still fell
- Global contagion on August 24, 2015 caused the Dow to fall 1,000 points at open
- China's retail-dominated market creates persistent momentum and sentiment opportunities
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