Why do A-shares often fall in tandem when the renminbi depreciates?

What happened: When the RMB depreciates rapidly or persistently against the US dollar, A-shares—particularly large-cap blue chips, stocks with high foreign ownership, and high-valuation growth stocks—have often come under pressure historically, although this is not a stable, mechanical rule. Some exporters and manufacturing companies may benefit from increased foreign-currency revenue or foreign-exchange gains.

Conclusion: The most likely explanation is that RMB depreciation and declines in A-shares are often two outcomes of the same macroeconomic shock: weakening expectations for economic growth, the property market, corporate earnings, or policy can trigger both RMB depreciation and downward revisions to stock valuations. The exchange rate can further amplify pressure on A-shares through dollar liquidity and the China-US interest-rate differential, changes in foreign investor allocations, lower risk appetite, and feedback effects. RMB depreciation itself does not necessarily cause stocks to fall.

CONFIDENCE

Medium

The source materials provide historical examples from 2015, 2018, 2022, and parts of 2023–2024, as well as research on foreign capital flows and evidence on industry-level foreign-exchange gains and losses. This provides solid support for the explanation that shared macroeconomic shocks are compounded by amplification mechanisms. However, the causes of depreciation and the drivers of stock markets differed across periods, and the available materials do not allow the independent contribution of each channel to be precisely distinguished. Attribution confidence is therefore moderate.

CAUSES

Candidate causes

PrimaryRMB depreciation and declines in A-shares jointly reflect weakening economic, earnings, and policy expectations

When expectations for growth, the property market, or corporate earnings deteriorate, investors may reduce their allocations to RMB-denominated assets, putting pressure on the RMB. At the same time, expectations for corporate earnings and valuations are revised downward, causing the exchange rate and stock market to weaken together.

Evidence

The source materials describe RMB weakness in 2018 and during parts of 2023–2024 as coinciding with weaker expectations for growth, the property market, domestic demand, or earnings.
The decline after the 2015 "811 exchange rate reform" was also accompanied by the unwinding of leveraged positions following a bull market, weaker growth expectations, and volatility in policy expectations, and cannot be attributed to exchange rates alone.
The source materials explicitly conclude that, during most periods of sharp declines, "common causes" may matter more than direct exchange-rate shocks.

PrimaryThe US dollar cycle, global liquidity, and the China-US interest-rate differential weigh on A-share valuations

RMB depreciation often coincides with Federal Reserve rate hikes, a stronger US dollar, higher US interest rates, or lower domestic interest rates in China. These factors can tighten global liquidity and increase valuation pressure on equities, with growth stocks and high-valuation assets more sensitive to the effects.

Evidence

RMB weakness in 2018 and 2022 both coincided with the US dollar cycle and the Federal Reserve's policy tightening.
The source materials suggest that the underlying drivers may be global risk-free rates, US dollar liquidity, and the China-US interest-rate differential, rather than the RMB exchange rate itself.
Domestic easing policies may partly offset the valuation pressure from currency depreciation, indicating that the direction of the impact depends on the relative strength of different macroeconomic forces.

SecondaryExpectations of RMB depreciation prompt foreign investors to reduce allocations to RMB-denominated assets

For overseas investors, RMB depreciation reduces A-share returns when measured in US dollars. If the market expects depreciation to persist, they may sell A-shares, initially putting pressure on the CSI 300, SSE 50, and stocks with high foreign ownership.

Evidence

Relevant research shows that RMB depreciation has a significant negative effect on net inflows through the Shanghai-Hong Kong Stock Connect and may weigh on the SSE 50.
The source materials indicate that by the end of 2020, the scale of A-shares held by northbound investors was sufficient to affect some large-cap stocks, sectors, and short-term pricing.
However, foreign investors account for a limited share of the overall market, and foreign outflows may sometimes be a consequence of market declines. They therefore cannot be considered the sole trigger of all A-share declines.

SecondaryThe risk-signaling effect of depreciation and exchange rate–stock market feedback amplify short-term volatility

Rapid or disorderly depreciation, especially when accompanied by capital-flow pressures, can be interpreted as a signal of rising economic, financial, or policy risks, leading to lower risk appetite. A-share declines may in turn reduce the appeal of RMB-denominated assets, creating a mutually reinforcing cycle.

Evidence

After the 2015 "811 exchange rate reform," the market linked the RMB adjustment to an economic slowdown and policy uncertainty, and stock-market volatility was markedly greater than the impact of corporate fundamentals alone would suggest.
Relevant research shows a two-way influence among the RMB, Shanghai-Hong Kong Stock Connect flows, and the SSE 50, rather than a one-way effect of the exchange rate on stocks.
The source materials also note that the capital account is not fully convertible, and that foreign-exchange controls and the central bank's management of expectations can alter the strength of feedback effects.

SecondaryCorporate foreign-exchange exposure leads to divergent earnings effects across sectors and individual stocks

Companies with export revenue, substantial foreign-currency assets, and costs denominated in RMB may benefit. Companies with high import dependence, large foreign-currency liabilities, or mismatches between the currencies of their revenues and costs may come under pressure. This channel matters for sectors and individual stocks but has limited explanatory power for the A-share indices as a whole.

Evidence

In 2022, A-share listed companies recorded overall foreign-exchange gains of approximately 47.7 billion yuan, indicating that RMB depreciation did not cause a broad deterioration in listed companies' earnings.
In 2022, some companies in sectors such as electrical equipment, automobiles, and machinery recorded relatively large foreign-exchange gains, while the transportation, real estate, and utilities sectors experienced foreign-exchange losses.
In 2022, overseas business revenue accounted for approximately 10.9% of total revenue for A-share companies. The source materials use this figure to conclude that the direct impact of exchange rates on overall market revenue was limited.

UncertainReduced returns in US dollar terms directly make A-shares less attractive as the RMB depreciates

Even if A-shares post positive gains in RMB terms, RMB depreciation can reduce returns for overseas investors when converted into US dollars, affecting global asset allocation.

Evidence

The source materials note that RMB depreciation reduces overseas investors' returns in US dollar terms and may discourage foreign inflows.
However, foreign investors also consider valuations, corporate earnings, dividend yields, and hedging costs. If A-shares are sufficiently cheap, they may still buy them and hedge the currency risk.
This mechanism therefore exists, but the available materials do not make it possible to independently confirm its contribution to any particular period of declines.

Caveats

The observation that "A-shares fall when the RMB depreciates" describes a correlation limited to certain periods, not a stable causal rule. Counterexamples include periods from 2014 to early 2015 and in 2022, when the RMB depreciated without a broad concurrent decline in A-shares.
It is important to distinguish weakness in the US dollar against the RMB, RMB weakness against a basket of currencies, and broad US dollar strength. Looking only at USD/CNY may lead to an incorrect assessment of actual RMB exchange-rate movements.
The pace of depreciation and market expectations matter more than the magnitude of depreciation alone. Orderly, gradual depreciation has different market implications from rapid, disorderly depreciation accompanied by concerns about capital outflows.
Foreign outflows, valuation contraction, and exchange-rate movements may affect one another. The source materials do not allow for rigorous identification of one-way causality or the precise weight of each factor.
Whether companies benefit or suffer depends on foreign-currency revenue, import costs, foreign-currency liabilities, overseas production, and hedging arrangements. The share of overseas revenue alone is not enough to determine the impact.

Research sources

This page was generated by AI with web research from a user-submitted prompt and shared publicly by the submitter. It is not investment advice.

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