FUTURES trading dominated the day as investors rolled over their positions into October contracts. A total of 30,149 contracts were traded, with 12,730 September contracts changing hands and 17,419 for October. Open interest for Tuesday was 43,526 lots. September contracts closed up 90 points at 9,715, while those for October closed 87 up higher at 9,712. Traders said there was a short squeeze in the morning session following the decision by the United States Federal Reserve not to raise rates. In the Hang Seng Index options market, investors leaned towards put options. In September options, 22,219 put options were traded compared with 17,495 call options. In October index options, 4,543 put options were traded compared with 1,751 calls. In December, 5,448 puts were traded compared with 2,645 call options. The situation was reversed for March 1995 options, with just 518 put options traded compared with 1,372 calls. Most of the action centred on the 9,800-level, although there was some heavy trading in 9,600-level puts. Traders expect activity to remain high because today is the settlement day for September contracts.