THE Hang Seng Index is likely to post more losses in the next five trading days after failing to find a foothold above 10,000 last week. Brokers do not expect the index to pull out of its slide until it falls to around 9,750. Others see it dropping to 9,600 or lower. There are now plenty of ill omens, with falls on Wall Street and London on Friday and signs of a rebound in US long bond yields all pointing the way down. A survey also shows economic confidence in Hong Kong at an historic low. After surging to a 13-month high of 10,069 last Monday, a lack of follow-through buying and heavy selling of futures dragged the index down. Blue chip stocks lost heavily on Friday when the index fell 86.37 points to close at 9,895.24.