FIRM support from local investors at below 9,240 has checked the Hang Seng Index futures and cash slide. Since the high of 9,655 on Thursday last week, the June contract has come off 310 points, losing 80 points on Monday, 95 on Tuesday and 115 on Wednesday. Yesterday it swung through 130 points in the day, ending off 20 points down at 9,345, a premium over the cash of 53 points. Some brokers suggested the firm support in trading had placed a short-term bottom on the index slide. July futures fell 50 points to 9,340. Trading was healthy, with 17,408 contracts changing hands - 17,000 in June and 408 in July. Activity in index options was characterised by different types of bear trading. Jardine Fleming said super bears bought 8,600 and 8,800 puts. Moderate bears bought near the money puts. There were also institutional bears who sold 9,400 and 9,600 calls. Open interest for Wednesday in futures saw 44,846 contracts in June, 647 in July and 89 in September. In index options for June, there were 10,602 calls and 13,857 puts. In July there were 119 calls and 321 puts. In September there were 1,933 calls and 2,015 puts and in December there were 1,282 calls and 359 puts.