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			 Included among the suspended services are liquidation of spot 
			positions for clients and some other activities related to 
			cross-border, onshore and offshore businesses, the sources said. 
			 
			The sources, speaking on condition that the banks were not named, 
			said the notices sent to the affected foreign banks by the People's 
			Bank of China (PBOC) gave no reason for the suspension. 
			 
			The PBOC did not immediately respond to a request for comment. 
			 
			The measure follows a slew of steps taken by the Chinese government 
			to keep the yuan stable since it devalued the currency in August. 
			 
			The spread between the onshore and offshore markets for the yuan, or 
			renminbi, has been growing since the devaluation, making it 
			increasingly difficult for the central bank to manage its currency 
			and stem an outflow of capital from an economy that is facing its 
			slowest growth in 25 years. 
			
			  
			The sources told Reuters that authorities had warned the banks that 
			if they engaged in lucrative carry trade, taking advantage of the 
			different exchange rates, the central bank would move to further 
			block arbitrage channels. 
			 
			"This is part of the PBOC's expedient means to stabilize the yuan's 
			exchange rate," said an executive at a foreign bank contacted 
			separately. 
			 
			The sources said the banks might have been targeted due to the large 
			scale of their cross-border forex businesses. 
			 
			An economist at a top government think-tank said the measure was a 
			temporary bid to curb demand for dollars that has been strengthening 
			toward the end of the year as the gap between the onshore and 
			offshore yuan exchange rates widens. 
			 
			"They hope to ease foreign exchange buying pressure and ease 
			depreciation pressure on the yuan," said the economist who declined 
			to be identified by name. "But I don't think the authorities will 
			take very strong capital control measures, they are likely to 
			reinforce the existing measures." 
			 
			The move could also ease pressure on the PBOC for direct 
			intervention in offshore markets to support the yuan, which has 
			contributed to a fall of more than $400 billion in China's foreign 
			exchange reserves this year. 
			 
			UNDER SCRUTINY 
			 
			In common with forex markets worldwide, there are no official data 
			on which banks are the most active in trading foreign exchange in 
			China. 
			  
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			A 2015 Asiamoney survey asking market participants which brokers 
			they used named Deutsche Bank as the top foreign forex provider in 
			China, followed by Australia and New Zealand Banking Group, HSBC, 
			Citigroup and BNP Paribas. 
			 
			Asked if they had received the central bank's suspension notice, 
			Citi, Deutsche Bank, HSBC and BNP Paribas declined to comment. There 
			was no immediate response from ANZ. 
			 
			Standard Chartered and DBS, which also conduct trading in foreign 
			exchange in China, did not respond to requests for comment. 
			 
			The latest move comes just three months since the PBOC ordered banks 
			to closely scrutinize clients' foreign exchange transactions to 
			prevent illicit cross-border currency arbitrage between the offshore 
			and onshore yuan. 
			On Wednesday, the country's foreign exchange regulator also said it 
			would improve its reserve position and contingency plans to curb 
			risks from abnormal cross-border capital flows. 
			 
			The yuan has come under renewed pressure since late November amid 
			speculation that Beijing would permit more depreciation after the 
			International Monetary Fund announced the currency's admission into 
			the fund's basket of reserve currencies. 
			
			  
			The onshore yuan traded in Shanghai has lost 1.44 percent of its 
			value since the end of November, and has repeatedly hit 4-1/2 year 
			lows. 
			The offshore market has traced a similar pattern. The Hong 
			Kong-traded offshore yuan hit an intraday low of 6.5965 on Wednesday 
			morning, its weakest since late September 2011. 
			 
			(Reporting by Shanghai Newsroom; Writing by Lu Jianxin, Nathaniel 
			Taplin and John Ruwitch; Additional reporting by Lawrence White and 
			Umesh Desai in Hong Kong, and Kevin Yao in Beijing; Editing by Will 
			Waterman) 
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