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2. Butterfly (options) - Wikipedia

   en.wikipedia.org/wiki/Butterfly_(options)

   A long butterfly options strategy consists of the following options: Long 1 call with a strike price of (X − a) Short 2 calls with a strike price of X; Long 1 call with a strike price of (X + a) where X = the spot price (i.e. current market price of underlying) and a > 0. Using put–call parity a long butterfly can also be created as follows:

3. Implied volatility - Wikipedia

   en.wikipedia.org/wiki/Implied_volatility

   A short time later, the option is trading at $2.10 with the underlying at $43.34, yielding an implied volatility of 17.2%. Even though the option's price is higher at the second measurement, it is still considered cheaper based on volatility. The reason is that the underlying needed to hedge the call option can be sold for a higher price.

4. Volatility smile - Wikipedia

   en.wikipedia.org/wiki/Volatility_smile

   For instance, the IBM call option, strike at $100 and expiring in 6 months, may have an implied volatility of 18%, while the put option strike at $105 and expiring in 1 month may have an implied volatility of 21%. At the same time, the historical volatility for IBM for the previous 21 day period might be 17% (all volatilities are expressed in ...

5. Call options: Learn the basics of buying and selling - AOL

   www.aol.com/finance/call-options-learn-basics...

   The options trader makes a profit of $200, or the $400 option value (100 shares * 1 contract * $4 value at expiration) minus the $200 premium paid for the call.

6. Call option - Wikipedia

   en.wikipedia.org/wiki/Call_option

   Option values vary with the value of the underlying instrument over time. The price of the call contract must act as a proxy response for the valuation of: the expected intrinsic value of the option, defined as the expected value of the difference between the strike price and the market value, i.e., max[S−X, 0]. [3]

7. Volatility (finance) - Wikipedia

   en.wikipedia.org/wiki/Volatility_(finance)

   The formulas used above to convert returns or volatility measures from one time period to another assume a particular underlying model or process. These formulas are accurate extrapolations of a random walk, or Wiener process, whose steps have finite variance. However, more generally, for natural stochastic processes, the precise relationship ...