Fed-watching was the most popular pastime in Hong Kong where the link between the greenback and the local dollar means US rate changes are instantly followed by local banks. After a brief break above 10,000, the Hang Seng slipped to 9960.7, down 53.4. The joint deal with Singapore-Telecom to buy a key stake in the troubled Global Crossing group raised few cheers among investors in Hutchison Whampoa, who fretted about the conglomerate's increasing exposure to the telecommunications sector, and the heavyweight stock dipped 0.5%.