China Stock Market Bubble (2014–2015)

A rapid boom and bust in Chinese equities. The Shanghai and Shenzhen markets surged roughly 150% in under a year, driven by margin lending, a frenzy of new retail investors, policy changes and enthusiasm. In June 2015, the bubble burst abruptly, erasing trillions of dollars in market value and prompting unprecedented government intervention.

The rally began after government policy change encouraging stock investments as a way to help companies raise capital and support their economic reforms. National media promoted the idea of a “healthy bull market,” helping convince millions of citizens (including students, retirees, and first-time investors) that the government would continue to support rising prices. Easy credit and rapidly expanding margin lending fueled speculation, while optimism surrounding economic reform, technology companies, and financial liberalization helped justify the extreme valuations.

The bubble initially developed quietly in 2014, when valuations were still relatively low and leverage was only beginning to expand. Momentum accelerated after the launch of Shanghai-Hong Kong Stock Connect in November 2014 and the first central-bank interest-rate cut in more than two years. By early 2015, even regulatory attempts to cool margin lending failed to slow the rally, which increasingly appeared to investors as a one-way, policy-backed trade.

On top of that, during the spring of 2015, restrictions on trading accounts were relaxed and millions of new retail accounts were opened each week. The government had hoped a stronger equity market would support deleveraging, but stock prices rose far faster than the market’s actual contribution to the real economy. The result was a widening gap between the narrative of reform-driven growth and the speculative reality of the boom.

By June 2015, valuations had peaked, the combined value of mainland exchanges exceeded $10 trillion, and the market entered a brief blow-off top before confidence suddenly broke. Once prices began falling, leverage transformed from fuel into accelerant. Margin calls triggered forced selling, liquidity stress intensified, and repeated government rescue measures deepened fears by pointing out how fragile the market had become. Major selloffs followed in July and after the August 2015 currency move, further reduced confidence in government support for the investors.

References:

Stock Connect Introduction (Shanghai Stock Exchange)

CITIC Securities pledges to fix margin trading business after reprimand (Reuters)

China allows mainland investors to open multiple A-share accounts (Reuters)

Timeline of China's attempts to prevent stock market meltdown (Reuters)

People’s Republic of China: 2015 Article IV Consultation (IMF Country Report No. 15/234)

Shanghai Composite Historical Data (Yahoo Finance)

The crash wiped out approximately $5 trillion in market capitalization within a few months. While largely contained to China’s domestic market, it caused a brief shock to global markets in August 2015 (the "China selloff"). Domestically, many middle-class investors saw their savings evaporate, and the episode raised questions about the stability of China’s financial system. It also prompted authorities to implement stricter controls on margin trading and improve market mechanisms.

Margin-fueled rallies can reverse with shocking speed, as leverage amplifies both gains and losses

Perceived government support can breed moral hazard and overconfidence among investors

Market interventions can temper panic in the short run but may distort markets and erode investor trust long-term

A speculative mania often entices a surge of first-time investors right before the peak