Seller of an option is said to be “short the option”. As described above, he/she would have an obligation but no right with regard to selling/buying the underlying asset in the contract. When you are short (i.e., the writer of) an equity option contract:
– Your maximum profit is the premium received.
– You can be assigned an exercised option any time during the life of option contract (in case of American options).
– Your potential loss is theoretically unlimited