The second half of August 1998 was dominated by two events. From 14 to 28 August, the Hong Kong Monetary Authority (HKMA) intervened in Hong Kong equity markets to prevent a speculative double play against their currency board. On 17 August, Russia announced its default on sovereign bonds. This paper demonstrates that the HKMA interventions had a substantial impact on the outcomes for US Treasury markets during this period using a careful analysis of high-frequency bond market data. On this evidence the shocks emanating from Hong Kong provided liquidity to the US Treasury market when it was most needed. Copyright © 2007 John Wiley & Sons, Ltd.