I am learning option trade. My question is: If a stock option only has less than a hundred of open interests, and if I buy 5 contracts of Feb 2010 put and the stock price is moving lower, can I always close (sell) my put position at any time? Or do I have to exercise the option because no body wants to buy my put? I want to buy option instead of the stock, but I am afraid I may have difficulty selling my put before the expiration date. Thanks.