CSTL251017P00022500 Option on Castle Biosciences

CSTL Stock  USD 16.86  0.32  1.93%   
CSTL251017P00022500 is a PUT option contract on Castle Biosciences' common stock with a strick price of 22.5 expiring on 2025-10-17. The contract was not traded in recent days and, as of today, has 88 days remaining before the expiration. The option is currently trading at a bid price of $4.8, and an ask price of $7.4. The implied volatility as of the 21st of July is 88.0.
When exercised, put options on Castle Biosciences produce a short position in Castle Stock. Because of this protective nature, they are typically used either for hedging purposes or to capitalize on Castle Biosciences' downside price movement.

Rule 16 of 2025-10-17 Option Contract

The options market is anticipating that Castle Biosciences will have an average daily up or down price movement of about 0.032% per day over the life of the option. With Castle Biosciences trading at USD 16.86, that is roughly USD 0.005398. If you think that the market is fully understating Castle Biosciences' daily price movement you should consider buying Castle Biosciences options at that current volatility level of 0.51%. But if you have an opposite viewpoint you should avoid it and even consider selling them.

In The Money Put Option on Castle Biosciences

An 'In The Money' option is one with a strike price that the current stock price has already surpassed. Some options investors can hedge their Castle Biosciences positions using in-the-money options. They may also want to buy options with some intrinsic value, not just time value. However, because in-the-money options on Castle Stock have intrinsic value and are priced higher than out-of-the-money options in the same chain, their volatilities are relatively smaller.
Put Contract NameCSTL251017P00022500
Expires On2025-10-17
Days Before Expriration88
Vega0.016352
Gamma0.05137
Theoretical Value6.1
Open Interest1
Strike Price22.5
Current Price Spread4.8 | 7.4
Rule 16 Daily Up or DownUSD 0.005398

Castle short PUT Option Greeks

Castle Biosciences' Option Greeks for the contract ending on 2025-10-17 at a strike price of 22.5 measures the various factors that affect its cost and calculated using a theoretical options pricing model. It helps investors make more informed decisions about whether to trade this option contract or when to trade it. In addition to Castle Biosciences' option greeks, its implied volatility helps estimate the risk of Castle Biosciences stock implied by the prices of the options on Castle Biosciences' stock.
Delta-0.875261
Gamma0.05137
Theta-0.003533
Vega0.016352
Rho-0.022873

Castle long PUT Option Payoff at expiration

Put options written on Castle Biosciences grant holders of the option the right to sell a specified amount of Castle Biosciences at a specified price within a specified time frame. The put buyer has a limited loss and, while not fully unlimited gains, as the price of Castle Stock cannot fall below zero, the put buyer does gain as the price drops. So, purchasing a put option on Castle Biosciences is like buying insurance aginst Castle Biosciences' downside shift.
   Profit   
       Castle Biosciences Price At Expiration  

Castle short PUT Option Payoff at expiration

By selling Castle Biosciences' put option, the investors signal their bearish sentiment. A short position in a put option written on Castle Biosciences will generally make money when the underlying price is above the strike price. Therefore Castle Biosciences' put payoff at expiration depends on where the Castle Stock price is relative to the put option strike price. The breakeven price of 16.4 is the critical point that divides the payoff function into two parts. Below the breakeven price, the payoff is dropping and negative (the seller makes a loss). Above the breakeven price, the payoff line is upward sloping as the option payoff increases in proportion to Castle Biosciences' price. Finally, at the strike price of 22.5, the payoff chart is constant and positive.
   Profit   
       Castle Biosciences Price At Expiration  
View All Castle Biosciences Options

Castle Biosciences Available Put Options

Castle Biosciences' option chain is a display of a range of information that helps investors for ways to trade options on Castle. In general, an option chain provides a helpful tool for investors to see all available option contracts, both puts, and calls, for Castle. It also shows strike prices and maturity days for a Castle Biosciences against a given expiration period. The table below combines all the option information in the form of a chain but before you use it, remember that it entails significant risk and it is not for everyone.
Open IntStrike PriceCurrent SpreadLast Price
 Put
CSTL251017P00050000050.032.1 - 35.532.1In
 Put
CSTL251017P00045000045.027.0 - 30.027.0In
 Put
CSTL251017P00040000040.022.0 - 25.522.0In
 Put
CSTL251017P00035000035.017.1 - 19.617.1In
 Put
CSTL251017P00030000130.012.6 - 14.812.6In
 Put
CSTL251017P000250002825.07.1 - 9.87.1In
 Put
CSTL251017P00022500122.54.8 - 7.44.8In
 Put
CSTL251017P00020000020.03.6 - 4.63.5In
 Put
CSTL251017P000175001617.51.9 - 2.751.25In
 Put
CSTL251017P00015000715.00.4 - 1.850.85Out
 Put
CSTL251017P00010000510.00.0 - 1.150.35Out

Castle Biosciences Corporate Management

Camilla ZuckeroExec CommunicationsProfile
John AbbottVP ControllerProfile
RN RNChief OfficerProfile
Kristen RNChief OfficerProfile
Tobin JuvenalChief OfficerProfile
When determining whether Castle Biosciences is a strong investment it is important to analyze Castle Biosciences' competitive position within its industry, examining market share, product or service uniqueness, and competitive advantages. Beyond financials and market position, potential investors should also consider broader economic conditions, industry trends, and any regulatory or geopolitical factors that may impact Castle Biosciences' future performance. For an informed investment choice regarding Castle Stock, refer to the following important reports:
Check out Trending Equities to better understand how to build diversified portfolios, which includes a position in Castle Biosciences. Also, note that the market value of any company could be closely tied with the direction of predictive economic indicators such as signals in estimate.
For more information on how to buy Castle Stock please use our How to buy in Castle Stock guide.
You can also try the Portfolio Optimization module to compute new portfolio that will generate highest expected return given your specified tolerance for risk.
Is Biotechnology space expected to grow? Or is there an opportunity to expand the business' product line in the future? Factors like these will boost the valuation of Castle Biosciences. If investors know Castle will grow in the future, the company's valuation will be higher. The financial industry is built on trying to define current growth potential and future valuation accurately. All the valuation information about Castle Biosciences listed above have to be considered, but the key to understanding future value is determining which factors weigh more heavily than others.
Quarterly Earnings Growth
(0.93)
Earnings Share
(0.19)
Revenue Per Share
12.371
Quarterly Revenue Growth
0.206
Return On Assets
(0.02)
The market value of Castle Biosciences is measured differently than its book value, which is the value of Castle that is recorded on the company's balance sheet. Investors also form their own opinion of Castle Biosciences' value that differs from its market value or its book value, called intrinsic value, which is Castle Biosciences' true underlying value. Investors use various methods to calculate intrinsic value and buy a stock when its market value falls below its intrinsic value. Because Castle Biosciences' market value can be influenced by many factors that don't directly affect Castle Biosciences' underlying business (such as a pandemic or basic market pessimism), market value can vary widely from intrinsic value.
Please note, there is a significant difference between Castle Biosciences' value and its price as these two are different measures arrived at by different means. Investors typically determine if Castle Biosciences is a good investment by looking at such factors as earnings, sales, fundamental and technical indicators, competition as well as analyst projections. However, Castle Biosciences' price is the amount at which it trades on the open market and represents the number that a seller and buyer find agreeable to each party.