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Expected Move Calculation Based on Option Prices
The expected move of a stock or index is calculated using a weighted average of the at-the-money straddle and the first and second out-of-the-money strangles. This method reflects the market's implied volatility and is used to estimate the potential price range of the underlying asset. The calculation involves taking 60% of the at-the-money straddle price, 30% of the first out-of-the-money strangle, and 10% of the second out-of-the-money strangle. This approach is based on historical practices on the trading floor before the advent of computers and is now automated on trading platforms.
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Expected Move Calculation Using IVX
The expected move is calculated using the IVX (Volatility Index) number derived from the options market. This number represents the overall volatility estimate for a specific stock and expiration date. It is used to determine the range within which the stock price is expected to move, based on statistical theory that 68% of the time, the price will fall within one standard deviation and 95% within two standard deviations. The IVX calculation incorporates all out-of-the-money options, providing a more comprehensive view of market expectations than just at-the-money straddles or strangles.
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Tom Preston Invented the Expected Move. Here's How to Actually Use It.Verify source ↗ Insight
Understanding Implied Volatility and Expected Range
Implied volatility is calculated using out-of-the-money calls and puts, providing a comprehensive view of market expectations. This volatility is then used to estimate the expected range of price movement. The expected range is typically based on one standard deviation, with a 68% probability of the price staying within that range. However, individual options may have different implied volatilities, leading to variations in the calculated probabilities and expected ranges.
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Tom Preston Invented the Expected Move. Here's How to Actually Use It.Verify source ↗ Q&A
How is the expected range of a stock or index calculated?
The expected range is calculated using a weighted average of the at-the-money straddle and the first and second out-of-the-money strangles. This method reflects the market's implied volatility and is used to estimate the potential price range of the underlying asset.
TakeawayThe expected range is derived from option prices and reflects the market's implied volatility, not directional bias.
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Tom Preston Invented the Expected Move. Here's How to Actually Use It.Verify source ↗ Q&A
What is the IVX number used for?
The IVX number is used to calculate the expected range of a stock's price movement based on the volatility of its options. It incorporates all out-of-the-money options and provides a statistical estimate of how much the stock might move within a given time frame.
TakeawayThe IVX number helps traders estimate potential price ranges for a stock, which can be useful for setting stop-loss or take-profit levels.
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Tom Preston Invented the Expected Move. Here's How to Actually Use It.Verify source ↗ Q&A
How is implied volatility used to calculate the expected range?
Implied volatility is calculated using out-of-the-money calls and puts, providing a comprehensive view of market expectations. This volatility is then used to estimate the expected range of price movement, typically based on one standard deviation. The expected range is used as a guide to determine where to place a short option, with the understanding that it is not a guarantee.
TakeawayImplied volatility is a key factor in estimating the expected range of price movement, which can be used as a guide for trading decisions.
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Tom Preston Invented the Expected Move. Here's How to Actually Use It.Verify source ↗ Q&A
Can these probability numbers and range numbers be used for trading strategies?
The speaker states that these numbers can be used for strategies, but it is the trader's call. They emphasize that this is not a trade recommendation.
TakeawayTraders can use the probability and range numbers for their strategies, but they must make their own decisions.
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Tom Preston Invented the Expected Move. Here's How to Actually Use It.Verify source ↗