THE Hang Seng Index screamed to a new record yesterday as foreign money, especially from Japan, flooded the stock market. A scramble for stocks lifted the index by 300 points in early trading, 167 of which came from trading on Friday in London. It closed at a record 9,629. Blue chips did best at $10.29 billion. But in London trading of index constituents many eased off a spread in modest profit-taking indicating the potential for a slow start today, unless strong domestic and Asian support comes in early on. Futures yesterday were traded furiously. The November contract moved to a 400-point premium to the cash market in early trading, something not seen since the heady days before the October 1987 crash. The November contract closed at 9,775, a 146-point premium. after hitting a high of 9,915. Turnover in the contract was 13,171, against a total market turnover of 13,448. While options trading was relatively slack, implied volatility leapt some three or four percentage points to around 35 per cent at times. It was around 28 per cent for most of the day, however.