Sept. 29 (Bloomberg) -- Dah Sing Banking Group Ltd. fell the most in a week in Hong Kong trading after saying it has HK$362 million ($47 million) at risk with Washington Mutual Inc., which failed last week.

Dah Sing fell 6.1 percent to HK$8.85 by 10:17 a.m. in Hong Kong. The company's ``exposure'' to Washington Mutual is equal to about 0.3 percent of its assets, Dah Sing said in a statement today. The Hong Kong-based lender also said it agreed to buy HK$400 million of new subordinated debt from Dah Sing Bank Ltd.

To contact the reporter on this story: Chia-Peck Wong in Hong Kong at cpwong@bloomberg.net.

Last Updated: September 28, 2008 22:37 EDT