China's revised foreign exchange rules, announced last week, have been taken as an enhanced effort to curb speculative capital inflow, but analysts said they mainly aimed to balance capital outflow and inflow and fill the loopholes in the previous forex regime.

The new rules, which went into immediate effect on Wednesday, will play a role in curbing the influx of speculative capital, analysts said.

The new regulation provides heavy penalties for improper currency transfer and conversion, among other moves. Analysts said they were intended to respond to the fast growth in the country's foreign reserves, which have amounted to about $1.8 trillion, part of which is believed to be speculative money eyeing exceptional returns as the yuan appreciates.

The regulation stipulates that the authorities would impose penalties of up to 30 percent of the capital involved in any unauthorized inward or outward foreign currency transfers; in severe cases, the penalties could be more than 30 percent - but lower than the amount of the involved capital.

For those who fail to use the capital in the way they claimed, such penalties also apply.

Economists said that as China de-pegged the yuan from the dollar in July 2005 and allowed it to appreciate gradually, a large amount of foreign speculative capital has managed to flow into the country to seek higher returns. Domestic traders, for example, can inflate their export claims so that they can settle more foreign currency as trade revenues.

Such capital could also flow in disguised in foreign direct investment funds, analysts said. In the first half of this year, China's realized foreign investment was 52.39 billion yuan, up 45.6 percent year-on-year, while the newly approved foreign investment projects dropped by 22.1 percent. Although the conflicting data is attributed to the increasing investment scale of individual investment projects, there may be some speculative capital flowing in as investment funds, said Bian Xubao, a macroeconomic analyst from Qilu Securities.

After such money enters, it often goes into the real estate or the stock market, pushing up asset prices. Once such capital starts to flow out of the country, it could incur asset price declines and could possibly lead to a financial crisis, as in the case of the 1997-98 Asian financial turmoil.

Such capital, also called "hot money", could inflate the country's money supply, increasing price pressure when China is fighting inflation.