# Questions tagged [implied-volatility]

The volatility of the price of the underlying security that is implied by the market price of an option based on an option pricing model.

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• 167
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### Implied volatility of Asian options under Black76 model

I found this repository (options pricing in Python) where they adjust IV for Asian options and they use it under the regular BS76 model. I could not find any proof of this result on the web, do you ...
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### finding Black Scholes implied volatility

I am trying to imply BS volatilities using Yahoo Finance! API (MSFT options) and Reuters zero curves. I am ignoring dividends for the moment. Note that I've also cleant the options' data (e.g., I make ...
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### Equivalent BS volatility formula under the Heston model?

Is there an equivalent BS volatility formula for the Heston model, something like Hagan's formula for the SABR model? Of course, such a formula will be an approximation as in Hagan's formula. Under ...
• 1,060
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### Interest Rate Volatility for Binomial Trees

Does anybody know where I can get the data or calculate interest rate volatility for modelling callable and putable bonds in binomial trees. I have swap curves data. Does any sources like Bloomberg ...
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### Estimating difference in implied volatility from difference in PV

Le us assume that depo and repo rates are zero. And let us assume I can read the ATM implied volatility of 1y option from the volatility surface. I now have some algorithm to reprice this option (let'...
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### When to use a Local Vol model vs Stochastic Vol Model?

I'm new to volatility modeling, I'm struggling to understand when to use a Local Vol model and when to use Stochastic Vol Model, Also now we use a hybrid model combining the two models ? Can someone ...
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### ATM Implied Volatility and Expected Variance

This answer claims that $$\sigma^2_{ATM}\approx E^Q\left(\frac{1}{T}\int_0^T\sigma^2_t dt\right)$$ ie implied ATM vol = risk-neutral expectation of integrated variance. Is there some proof available? ...
• 686
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### Help needed in replicating FX Implied Vol Surface

I am relatively new to this area and am doing some self studying on SLV model. I am however getting stuck on trying to replicate this implied vol surface (which I will use to calculate the local vol) ...
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### Model-Free Implied Volatility: Data of Expired Options and Bond Price

I am attempting to calculate Model-Free Implied Volatility for several equity indices (S&P500, NASDAQ100, CAC40, FTSE100, DJIA, EUROSTOXX50, NIKKEI225, NIFTY50). I wish to get historical data of ...
1 vote
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### Calibrate the SABR model to the implied volatility surface

I'm currently trying to calibrate the SABR model. The question I have is that when I consider papers and other websites I only come across cases where the SABR parameters are calibrated to the implied ...
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### implied vol smile relative to atm vols

Am I correct in saying that most stochastic vol models are meant to behave in a way that as atm vol goes up the smile comes down and risk reversals become "less stretched?" - by that i mean ...
• 11
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### Deriving strike from Delta

According to the following thread: How can I calculate the strike price or implied volatility from a given delta? To back out some strike given some Delta, you simply use realized vol (plus a few ...
1 vote
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### Deriving vol of vol from volatility futures price

From Colin Bennet's trading volatility (pg 117), he says: "A forward on a volatility future is short vol of vol. This means it is possible to back out the implied vol of vol from the price of ...
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### Strike arbitrage in discrete implied volatility grid

I need to test strike (butterfly) arbitrage on a discrete implied volatility grid. I know that the traditional procedure for continuous case is (for a given maturity T): See the Dupire formula in ...
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1 vote
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### Best Way To Compute the Volatility Risk Premium

I'm trying to come up with a measure for the volatility risk premium (VRP) for a strategy I want to implement, but I'm not entirely sure how to proceed. My situation is as follows. The underlying is ...
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### Approximating SPX index skew using PutDex & CallDex

I hope someone can help me with this. As I don’t have access to historical options data I am wondering if it is possible to deduce SPX options skew from various volatility indices - in particular ...
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### When does the underlying become the derivative?

Since options contracts are created by open interest in the contract, it is conceivable that the notional of the total options contracts can exceed the value of the underlying. If that happens, does ...
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1 vote
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### Market models of implied volatility and no arbitrage

Something has been bugging me for a while, and I can't really find an answer to it in papers. Maybe somebody can help me out. In addition to modelling the instantaneous vol, or modelling forward ...
• 4,871
1 vote
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### Precise Implied Volatility of Heston Model

I wish to calculate precise implied values from Heston model for extreme inputs (deep in/out of the money or short time to expiry) There is a good demonstration for using QuantLib library for this in ...
• 11
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### Calendar arbitrage in implied vol grid with discrete and proportional dividends

I have an implied vol discrete grid, obtained from market data. To obtain prices from these implied vols, a dividend model with discrete and proportional dividends is used. How can I verify if there ...
• 785
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### Why do VIX spot and futures converge if there is no cash and carry arbitrage?

Since VIX spot is not tradable, why do the futures and spot converge @ expiration? By what mechanism does this occur if arbitrage is not one of them?
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### Option implied risk neutral distribution vs BKM risk neutral moments

I am doing some research on the option implied risk neutral distribution and methods calculate it, and so far have come across two ways to do so. The first way is through the Breeden-Litzenberger ...
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### Calculating model-free implied volatility [closed]

I am trying to come up with model-free implied volatility as in Britten-Jones, M. and Neuberger, A. (2000) Option Prices, Implied Price Processes, and Stochastic Volatility, Journal of Finance, 55, ...
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### Maximum entropy probability distribution for $S_T$ implied from discrete market quotes

Consider a maturity $T$, for this maturity I have some implied volatility from market denoted $\sigma^{0}_{i}$. I want to interpolate these volatility using Entropy approach, by using $\sigma^{0}_{i}$...
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1 vote
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### Interest Rate Options - OTC vs Exchange, vol difference

I understand that Exchange Traded Interest Options (USD Libor 3m or Euribor 3m) trade with a lower volatility than the respective Cap or Floor for an equivalent structure. Can anyone give any colour ...
• 1
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### Buying a double no touch

Why does buying a double no touch get me long butterfly exposure? I understand short volatility exposure but can’t see why I would get long butterfly as I would’ve thought I would want wing volatility ...
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### Implied volatility plotted against the strike price in Heston model

How can I reproduce the implied volatility curve (plotted against the strike price) in the Heston model (i.e. the blue line in the graph below)? What's the equation that I have to set up and solve? ...
153 views

### Implied volatilities for different options that track the same stock

I have a somewhat basic question regarding option prices. Suppose we have an underlying stock and two different options (that have different strike prices, maturities, etc.) that track this stock. ...
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### Why is the price of an ATM straddle not the same as the "dollar move" from implied volatility?

Knowing that implied volatility represents an annualized +/-1 Standard Deviation range of the stock price, why does the price of an ATM straddle differ from this? Also for simplicity, no rates, no ...
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