Questions tagged [delta-hedging]
The delta-hedging tag has no usage guidance.
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2answers
256 views
why gamma decreases when option is deep in the money?
Gamma decreases when a call option goes either deeper in, or deeper out of the money. That is due the demand for the call option. I can imagine the demand for the option would decrease as it goes ...
1
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1answer
74 views
Delta hedging/Gamma PnL
Suppose I am long USDIDR straddle with my start of the day delta being USD10m long IDR and USDIDR gamma being $5m.
There is a 1% intra-day IDR strengthening, so my delta becomes roughly long IDR 15m....
2
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0answers
30 views
Confused by Solution to the Expected Profit when Hedging an option using Implied Volatility (from Wilmott 2006)
Paul Wilmott on Quantitative Finance 2nd Ed (section 12.5.1) gives a solution to the initial expected profit when hedging using delta based on implied volatility as
$$\frac{1}{2}(σ^2 - σ̃^2) \,\int_{...
2
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0answers
47 views
Effect of mean reverting Volatality in Black and Scholes? [closed]
Can someone please elaborate what would be the effect of a mean reverting volatility (instead of a constant volatility) in pricing options using BS ?
Also how would the greeks vary?
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1answer
92 views
How is the performance measure computed here?
The image is from John C Hull Textbook titled Options, Futures and Other Derivatives ( page 407 - Ninth Edition). The table above was obtained after computing the delta of stock price, shares ...
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2answers
210 views
Hedging with machine learning
I’ve been thinking about an interesting problem lately: Suppose I have a position in an exotic derivative. How can I automate the hedging process?
Traditionally, one build a pricing model and ...
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1answer
81 views
How is FX cross rates options are priced?
Say I have market for EUR/USD and also USD/CAD, how would EUR/CAD would be priced and hedged in practice? What are good papers/book chapters to read on that? (Assuming basic knowledge already on ...
2
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1answer
97 views
Expected value of delta-hedged portfolio
Consider portfolio in black-scholes world
$\Pi = \Delta S - V$, where $S$ is the stock price and V is the price of the option.
I have read that if we set $\Delta = \frac{\partial V}{\partial S} $ ...
2
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0answers
64 views
Option order imbalance
Currently studying the paper:
HU, Jianfeng. Does Option Trading Convey Stock Price Information?. (2014). Journal of Financial Economics. 111, (3), 625-645.
Research Collection Lee Kong Chian School ...
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0answers
65 views
Can prediction of realized volatility for next day improve delta hedging (gamma scalping)?
Im quite confused. As I understand from standard delta PNL of option + underlying position, pnl is equals to difference between realized and implied vol weighted by gamma.
However, as I understood, ...
0
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0answers
58 views
Implied Volatility of a call plus its delta
I would like to understand if exists a smart way to imply the volatility from a quote that is the sum of a call and its delta: is there any method other than simple iterative minimization?
1
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2answers
158 views
Heging against stochastic interest rate
I am working on an Index and I am trying to price Call options on it. I work with the 3 Months LIBOR as Cash.
I use the following Black-Scholes formula
$$C_{t} = S_{t}e^{-q_{t}(T-t)}\mbox{N}[d_{1}(t)]...
2
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1answer
82 views
Why are vanilla OTC options are quoted in delta and vol?
Why do we quote options in delta bid-ask & volatility bid-ask & why not it is quoted in terms of option premium?
2
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1answer
49 views
duration hedging of illiquid bonds
Let's say that I have a totally illiquid 30Y bond that I want to hedge with short-dated bonds and that the market is liquid up to 10Y bonds.
After 20 years, my 30Y bond will become a 10Y bond so I'll ...
4
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1answer
77 views
Using BS Delta to hedge in a LV Model
Why do some people use a Black Scholes Delta instead of the delta given by the Local Volatility model?
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0answers
51 views
Delta hedge a long option using a short option [closed]
If I long a call option of 1 mio USD/SGD for example, I understand that at strike price (ATM), delta is approximately +0.5.
To approximately hedge this delta, I also understand we can short 0.5 mio ...
0
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2answers
364 views
How does a Delta Hedged portfolio yield the Risk-free?
Here I'm considering the simple case of a dealer writing call options on a stock and hedging the short position with a "textbook" Delta Hedge, i.e. goes long on $N_c \times Delta$ stocks (where $N_c$ ...
0
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1answer
179 views
Difference in exposure between delta hedged options, ATM straddles and delta hedged straddles
What is the difference in exposures between delta hedged options, ATM straddles and delta hedged straddles. They all seem to provide the same thing, which is exposure to volatility.
What are the ...
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2answers
582 views
Interpertation of delta hedge error in Black Scholes
I have spent some time to prove the delta hedge error as described in this paper paper page 16-17 by Davis. The proof is discussed here Deriving Delta Hedge error in the B-S setup (part 2) (a post by ...
1
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1answer
152 views
Deriving Delta Hedge error in the B-S setup (part 2)
In this paper paper page 16-19 by Davis
and this discussion
derivation of the hedging error in a black scholes setup,
the derivation of the delta hedging error in the Black Scholes model is discussed.
...
2
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1answer
58 views
Change in call price Value as time goes by
In various papers and discussions in here I have seen that in delta hedging setup people compute the Change in value/Price of Call option by:
$$
dC_t = \Theta_t dt + \Delta_t dS + \frac{1}{2} \...
3
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2answers
412 views
Gamma/delta dynamics in the Black Scholes model and it's relation to PnL (Basic of option theory)
If we are in a Black Scholes setup and a I have a Call option and hedged it by shorting delta amount of its underlying.
What does the second derivative of the call with respect to Price of the ...
0
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1answer
258 views
Bachelier model call: computation of delta of a call option
The price of a call with a stock with Bachellier process as its underlying and zero interest rate is giving by:
$$C(t)=(S(t)-K)\Phi(\frac{S(t)-K}{\sigma \sqrt{T-t}})+\sigma \sqrt{T-t} \phi(\frac{S(t)-...
3
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0answers
54 views
Computing Malliavin Derivative for European Call Payoff
Let $X_t$ be a continuous local-martingale modeling the stock price given by
$$
X_t = \int_0^t \sigma_t(T,K)dW_t
,
$$
and $\sigma_t(T,K)$ is an $L^2$-measurable process not adapted to $W_t$'s ...
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0answers
45 views
Delta of a Digital option [duplicate]
A digital option with a Stock as the underlying pays 1 if the stock price at maturity is above the strike $S_T>k$ and it pays nothing otherwise.
I have computed the value proces to be following:
$$...
6
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1answer
197 views
Hedging error in a stochastic volatility model
I would like to find how much error I make when I hedge a call option using Black Scholes model in a market which is actually governed by a stochastic volatility process such as
$$dS_t = rS_tdt + \...
5
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3answers
2k views
What really is Gamma scalping?
How does Gamma scalping really work? It seems there is no true profit scalped. If we look at the simplest scenario, Black-Scholes option price $V(t,S)$ at time $t$ and the underlying stock price at $S$...
4
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1answer
126 views
Floating Strike Lookback Delta Risk
I'm running through some delta hedging simulations of floating strike lookback call options (that is, I'm short the options) during a volatile (downside) period for the underlying and some very odd ...
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0answers
232 views
Question about Delta Hedging
So in Delta Hedging, we know that the delta value gives us the hedge ratio between the option and the stock. For example, if we are long 10 shares of stock, and the delta value is 0.5, then we would ...
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1answer
164 views
Can we 'predict' the delta of a stock? The delta of a stock is $\pm 1$ right? [closed]
“A stock is like a living organism. A sparrow, say. And we are able to create an emergent-based abstraction of that sparrow, which closely approximates the sparrow itself, accounting for migration ...
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0answers
42 views
Calculate latest underlying price (or option), given new option (or underlying) market price?
Given a reference underlying price, reference option price, delta and gamma, if I receive a new underlying/option price what equation should I use to calculate the respective option/underlying price (...
3
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1answer
175 views
Traders view on hedging of FX Futures with FX Forward
I would like to get a trades view on hedging a FX Forward with a FX Future by just moving the (1) FX_Spot rate and ignore the other risk factors (2) ccy1 DV01 risk, (3) ccy2 DV01 risk, (4) basis swap ...
2
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0answers
435 views
Delta hedging vs Strangle
Long volatility delta hedging and strangle are common long volatility strategies. We can make strangle delta neutral(in $) by buying more puts than calls(if an absolute value of put delta is less than ...
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0answers
997 views
Short Call Hedge. Options and gamma trading
Let’s say a trader sells a Short Call with strike 100 (for making profit with the premium) at-the-money (for highest extrinsic value there). For hedging until expiration, he buys the underlying share ...
2
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3answers
350 views
Tracking error Black Scholes
Suppose an asset follows the SDE
$$ d S_{t}^{1} = \mu S_{t}^{1} dt + \sigma_{t} S_{t}^{1} d W_{t} $$
Furthermore assume that $r = 0$ and a trader who uses Black-Scholes for pricing and hedging with ...
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0answers
623 views
Gamma Imbalance / Exposure
I am currently writing my thesis about the lack of volatility / changing market structure we see nowadays on the financial market. I believe an important factor in this development is the delta-...
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2answers
868 views
Delta Hedging with fixed Implied Volatility to get rid of vega?
I'm wondering if i should use a floating IV or a fixed IV to delta hedge my options every day.
I've read this post but would like different information :
Delta Hedging with fixed Implied Volatility ...
2
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3answers
163 views
Why don't we take the differential to the Delta in the Delta hedge-portfolio
For option $V(S,t)$ with underlying asset $S$, we have a hedge portfolio
$$\Pi = V(S,t) - \Delta(S,t)S$$
I always confuse here, when we take the differential of $\Pi$
$$d\Pi = dV -\Delta dS$$
why ...
0
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2answers
673 views
Dynamic Delta Hedging And a Self Financing Portfolio
Let's assume the usual Black Scholes assumptions hold. My question is related to an answer on this question. There, the weights ($\Delta_t^1$,$\Delta_t^2$) are derived which form a locally risk free ...
3
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3answers
363 views
Derivation of BS PDE problem using Delta hedging
I've always been confused with Delta hedging. It is well-known that for a (smooth enough) function of $(S,t)$ we have, due to Ito's lemma, that:
\begin{eqnarray*}
dC = \left(\frac{\partial C}{\partial ...
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1answer
339 views
Delta Hedging: Clarification example of the book “Hull, Options, Futures, and Other Derivatives” [closed]
By "Hull, Options, Futures, and Other Derivatives":
Suppose that, in figure,the stock price is \$100 and the option price
is \$10. Imagine an investor who has sold 20 call option
...
0
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0answers
41 views
Can discretization of delta hedging give negative profits?
If we long a call and short delta the underlying, and then discretely update the hedge, we expect to profit if realized volatility is greater than implied volatility.
However, since we are doing ...
1
vote
1answer
464 views
Example of delta one products
Not sure if this is the right place to ask such question.
How close to 1 should the delta be in order for the product to be classified as delta one.
2.What examples of delta one products are there?
7
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1answer
967 views
delta-hedging is failing
and thank you for answering me !
While I was recently testing a delta-hedging on a few products, I got a P&L result of 20% for some of them.
First, I thought that the implementation was ...
3
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1answer
72 views
Delta-hedging non-volatile stock
If a stock has zero vol and some positive drift $\alpha$ (in a BS-setting) and we delta hedge a long call option dynamically over a year with some positive implied volatility.... how would that work ...
5
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1answer
5k views
Proof of gamma profit formula
http://www.volcube.com/resources/options-articles/gamma-hedging-trading-strategies-part-i/
I would like to have proven to me the above formula, mostly because I don't quite understand it. The formula ...
3
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1answer
227 views
Basic practical question about Delta hedging
I am trying to understand a simple thing about Delta hedging in the Black-Scholes world. I know I'm doing something blatantly wrong, I just can't see it now.
Let's say I write a call option and sell ...
3
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1answer
359 views
How to compute delta and delta-hedge in practice?
I keep hearing things like
\begin{align*}
``\text{Traders make their book delta-neutral at the end of each trading day''}
\end{align*}
I am wondering what this means, and why this is supposed to give ...
3
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1answer
261 views
Hedging a binary option close to expiry
I have been asked to prove mathematically that a binary option close to maturity should be hedged using a call spread with the same maturity.
I understand that far from maturity, one would use delta ...
2
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0answers
51 views
Reference for delta hedging programmatically
I learned some of the basic theory of Bjork (chap 1-9)
and would now like to study some (discrete delta) hedging using programming software.
We had an exercise in school where we hedged a call ...
