Options are financial derivatives that give the holder the right, but not the obligation, to buy or sell an underlying asset at a predetermined price and time. Options are often used as a way to hedge risk or speculate on the direction of the underlying asset.

There are two types of options: call options and put options. A call option gives the holder the right to buy the underlying asset at a certain price, known as the strike price, while a put option gives the holder the right to sell the underlying asset at the strike price.

The value of an option is determined by several factors, including the price of the underlying asset, the strike price, the time until the option expires, the volatility of the underlying asset, and the risk-free interest rate.

One way to value options is through the use of a pricing model, such as the Black-Scholes model. This model takes into account the aforementioned factors to determine the theoretical value of an option.

Another way to value options is through the use of option pricing tables, which provide the market prices of options with different strike prices and expiration dates for a particular underlying asset.

It's important to note that the value of an option is not fixed and can change over time. This is because the value of the underlying asset, as well as other factors, can change, which can impact the value of the option.

In conclusion, options pricing involves determining the value of an option based on various factors, including the price of the underlying asset, the strike price, the time until expiration, and the volatility of the underlying asset. This value can be determined through the use of pricing models or option pricing tables.