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2015 China Market Turmoil

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2015 China Market Turmoil

China's stock market turbulence of 2015–2016 combined two distinct crises: a domestic equity bubble inflated by retail margin trading, and a currency shock from an unexpected yuan devaluation. Together, they produced violent market moves, a failed circuit-breaker experiment, and a wave of global anxiety about China's economic trajectory that spread well beyond its domestic markets.

The margin-driven bubble​

The Shanghai Composite Index rose approximately 150 percent between June 2014 and June 2015, driven largely by retail investors trading on borrowed money. Margin balances on Chinese exchanges grew from roughly 400 billion yuan in mid-2014 to over 2.2 trillion yuan at the June 2015 peak. Unlike the professional leverage that drove previous crises, this was predominantly retail leverage—millions of small investors who had opened brokerage accounts for the first time, convinced by official media commentary that the bull market reflected China's economic strength.

The crash and circuit-breaker failure​

When the market began falling in June 2015, margin calls triggered forced selling, which triggered more margin calls—the same cascade that had characterized the 1929 crash. The government responded with direct intervention: banning large shareholders from selling, providing emergency lending to brokerages, and purchasing index futures to support prices. The interventions stabilized markets temporarily but at the cost of credibility.

In January 2016, regulators introduced circuit breakers designed to halt trading when the CSI 300 index fell 5 percent or 7 percent. On the very first day the rules were in effect, the 5 percent threshold was hit within minutes, triggering a 15-minute halt; when trading resumed, the market immediately fell to the 7 percent level, closing the market for the day. The circuit breakers accelerated the panic they were designed to prevent, because investors rushed to sell before the halt. The rules were suspended after four days.

The yuan devaluation​

In August 2015, the People's Bank of China announced a change in how it set the yuan's daily fixing rate—a technical adjustment that resulted in a roughly 2 percent devaluation over two days. The move shocked global markets, not because of its immediate magnitude but because of what it implied about China's growth outlook and the possibility of further devaluation. Commodity prices fell sharply. Capital outflows from China accelerated, reducing foreign exchange reserves by more than $500 billion over the following year.

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