# All Questions

12,138 questions
75 views

### python scipy optimize minimize arguments for Implied Volatility

I am having some trouble getting the 'correct' solution to a function where I am trying to utilize scipy.optimize.minimize. In the code below, I create a function <...
81 views

### What is a counterparty risk trading desk

Can someone explains what does the above mentioned desk do? What are their responsibilities and how do they manage them, where do they fit into the rest of the organization?
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### How to hedge PLN account on Interactive Brokers

I know that you can't have PLN account on IB, the PLN input is exchanged into USD, GBP etc. currency. However I would like to hedge the other currency exposure against PLN, or at least find out how to ...
55 views

### Are extended SABR models useful for options with non-negative underlying

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2731359 http://janroman.dhis.org/finance/SABR/ZABR%20Andreasen.pdf In the two articles listed above we see several ways to extend the original ...
34 views

### Spread duration and spread risk for a T bill

How is the spread duration/ spread DV01 for a T bill computed. For a bond paying fixed coupons, the spread DV01 is generally taken to be the yield DV01 (yield sensitivity). But the bond equivalent ...
118 views

### Ito's Lemma for this problem

I'm attempting to prove a lemma from a paper, in the context of optimal contracts. $r,\rho,\gamma,\alpha,\sigma$ are all known constants. $dR_t = (\alpha + r)dt + \sigma dZ_t$ where $Z_t$ is a ...
48 views

### stress testing zero coupon yield curve

i'm currently trying to stress test the zero coupon yield curve using daily observations from 2003 to 2019. Each Zero coupon yield curve originate from an actuarial curve with 37 tenors that range ...
60 views

### Adjustments for Multicollinearity in Returns-Based Style Analysis

I am currently researching how to estimate a portfolio's effective mix (essentially figuring which weights to hold in broad indices that would have produced most similar return patterns). Sharpe's ...
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### Deriving sources of return (over.) extrapolation from surveys

I would like analyze what causes investors to extrapolate returns and there are several theories out there that aim to explain such behavior, such as for example the representativeness heuristic by ...
64 views

### USD OIS curve. Why is the the bid bigger than the ask for maturities > 7 years?

I was wondering why the bid is larger than the ask for maturities bigger than or equal to 7 years? If i export the screen to Excel i can see how the bid and ask swap rates are calculated. For the ...
43 views

### Calculation of duration based on spot rates

As I know, Macaulay and modified durations are defined in terms of yield to maturity (YTM), in other words, in order to calculate durations we use yield to maturity as a discount factor. Suppose, ...
115 views

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### What is market standard model in equity, FX and interest rates exotics?

Is there any industry consensus about the model to use for pricing exotics in equity, FX and interest rates? I assume that for vanilla options they all use Black model, but how about exotics? Also, ...
111 views

### R: Calculating cumulative return of a portfolio

I've downloaded adjusted closing prices from Yahoo using the quantmod-package, and used that to create a portfolio consisting of 50% ...
22 views

### Mean squared error calculation in portfolio optimization [duplicate]

Hi I'm having an explanation like below. I'm trying to find the minimum global portfolio and I found following explanation This explanation says the lambda can be identified via k-fold cross ...