Everest Capital Global fund, an $830 million hedge fund, was forced to close after betting on depreciation of the Swiss franc. The fund is believed to have lost nearly a $1 billion in Swiss francs.

In this context, the $100 million made by the ESG fund is much less significant in scale.

Carr says hedge funds can often lead this type of market shift because their investment is likely to involve large volume trades resulting from their highly leveraged positions. In addition, their short-term trading horizon means they are more certain to invest in market disequilibria that are likely to readjust themselves quickly, unlike other funds that invest for the long term, like pension funds.

Many economists share Carr's views.

"The ability of foreign hedge funds to influence China's domestic financial markets is extremely limited. The amount of money that foreigners are able to invest in China's stock markets pales in comparison to the amount invested by domestic players," says Duncan Innes-Ker, regional editor for Asia at the Economist Intelligence Unit.

Andrew Lee, deputy head of ultra-high net worth and alternatives in UBS Wealth Management's Chief Investment Office, says the hedge funds that benefited from their bearish bets on the yuan's depreciation are not representative of the industry as a whole.

"Although a number of funds did benefit from the People's Bank of China's decision to widen the exchange rate band and the subsequent renminbi devaluation, this is not a consensus view and hedge fund positioning in the renminbi is not universally bearish.

"Furthermore, there is minimal direct linkage between bearish currency bets by global investors and the performance of Chinese financial markets," Lee says.

Mao Lei, an assistant professor of finance at Warwick Business School, says he believes the slowdown in China's real economy is worrying, therefore Chinese regulators should focus on growing the real economy and improving the efficacy of regulation rather than being concerned about international investors' activities.

Although the ESG hedge fund made money through the renminbi put options, there must be a counterparty to this trade who lost money, so the impact will not be on the Chinese economy, Mao says.

However, he says the hedge fund's ability to make such profits reflects a lack of transparency in the Chinese central bank's decision-making process that could reduce investor confidence, which is a wider problem.

Mao adds that China's financial market liberalization should be done gradually because there are still potential risks relating to freeing further capital flow, especially in relation to the banking system.

"The aggregate leverage of the economy is high, and our banking system is not transparent enough, and we do not know whether it can withstand large shocks in some key sectors, like the real estate market," Mao says.

The amounts that foreigners can invest in China's stock and equity markets are very limited. Only institutional investors are able to apply for a license to invest in China's onshore financial markets, and even then their investments are subject to a quota.

Typically they would make investments through mechanisms like the Qualified Foreign Institutional Investor scheme, and more recently, they can access China's stock market through the Shanghai-Hong Kong Stock Connect, which allows foreign investors in Hong Kong to buy a selected number of Chinese stocks.

Jonathan Bell, chief investment officer of Stanhope Capital, says while the impact hedge fund activities can have on China's equity and currency markets is now limited, it would increase as China liberalizes its market and reduces capital controls.

This would be considered a positive development for financial markets, because frequently the actions of hedge funds only bring prices to the levels they should be.

For example, in the situation of both the Swiss Franc revaluation and the pound being taken out of the Exchange Rate Mechanism, government policies were holding currencies at levels inconsistent with market demand and supply. Hedge funds and other speculators forced a correction that was required anyway, he says.

"Both the fall in China's stock market and the depreciation of the Chinese currency are driven by market forces. In the future the amount of overseas hedge funds betting on China's market could have a larger impact on its financial markets and economy, but it will be a necessary step in China's market liberalization process," Bell says.

cecily.liu@chinadaily.com.cn