Aspects of the present disclosure provides a method to enable the selling and buying of a property at a future time for a pre-agreed price. In accordance with aspects of the disclosure, a series of call options and put options on a property are created and transacted between a seller and a buyer. The call option defines the buyer' s right to buy and seller' s obligation to sell the underline property. The put option defines the seller' s right to sell and buyer' s obligation to buy the underline property. Property sellers, buyers, and investors, thus can plan guaranteed real estate transactions in the future times, can hedge against property price fluctuations, can save real estate transaction costs; and can manage real estate investment needs with measured and known risks therefore promoting more transactions and adding liquidity to the real estate market.