Call Options - A call option buyer has right to buy the underlying asset at a certain price (Strike Price) within a specific time frame. They are similar to having a long position in the underlying asset or the futures contract of the asset. The buyer of a call option will make money if the price of the asset goes up. On the contrary a Call Option seller has the obligation to sell the underlying asset at the strike price within a specific time frame. The seller will make money equivalent to the premium amount if the option contract lapses else he can make unlimited losses as the underlying asset goes up.