Option Series

An option series is a group of options with the same underlying asset, expiration date, and strike price. The different types of options within a series are distinguished by their different call or put designation and whether they are American or European style.

* **Call options** give the holder the right to buy the underlying asset at a specified price (the strike price) on or before a specified date (the expiration date).
* **Put options** give the holder the right to sell the underlying asset at a specified price (the strike price) on or before a specified date (the expiration date).
* **American-style options** can be exercised at any time before the expiration date.
* **European-style options** can only be exercised on the expiration date.

The price of an option is determined by a number of factors, including the current price of the underlying asset, the strike price, the time to expiration, and the volatility of the underlying asset.

Option series are often used by investors to hedge against risk or to speculate on the future price of an underlying asset. For example, an investor who is bullish on the future price of a stock might buy a call option on that stock. If the price of the stock rises, the value of the call option will also rise, and the investor can then sell the option for a profit. Conversely, an investor who is bearish on the future price of a stock might buy a put option on that stock. If the price of the stock falls, the value of the put option will also rise, and the investor can then sell the option for a profit.

Option series can be a complex financial instrument, and it is important to understand the risks involved before trading them.