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by janickg
August 11th, 2008, 7:07 pm
Forum: Student Forum
Topic: correlation
Replies: 2
Views: 50300

correlation

If there is no serial correlation, then no difference - otherwise I would expect some.
by janickg
August 6th, 2008, 4:28 pm
Forum: Student Forum
Topic: Non-Pos Definite Covariance Matrix in Matlab
Replies: 4
Views: 98494

Non-Pos Definite Covariance Matrix in Matlab

That is correct.
by janickg
May 16th, 2007, 4:52 pm
Forum: Programming and Software Forum
Topic: Deploying with Matlab .NET Builder, Licensing Issues
Replies: 0
Views: 71858

Deploying with Matlab .NET Builder, Licensing Issues

Does anyone here know a way to implement license control over a deployed COM object generated by the Matlab .NET Builder?
by janickg
May 9th, 2007, 5:19 pm
Forum: Student Forum
Topic: Utility maximization in practice
Replies: 5
Views: 72591

Utility maximization in practice

Ask a trader to quantify happiness into a utility function, there in itself is also a problem. Fine, you found the ability to maximize utility functions - but does that function truly represent the qualitative problem?
by janickg
May 9th, 2007, 5:17 pm
Forum: Student Forum
Topic: can a portfolio have several Beta?
Replies: 5
Views: 72618

can a portfolio have several Beta?

<t>Market is also relative. If you are a US large cap manager, then in your model you will (or should) measure beta to a US large cap index / benchmark be it the S&P 500, Russell 1000 or what not. This is how it is done in practice. As that particular manager, you really don't give a flying sh*t...
by janickg
May 7th, 2007, 12:41 pm
Forum: Student Forum
Topic: Utility maximization in practice
Replies: 5
Views: 72591

Utility maximization in practice

Most of the time it is computationally taxing.
by janickg
February 27th, 2007, 11:18 pm
Forum: Student Forum
Topic: optimisation problem
Replies: 3
Views: 78150

optimisation problem

Why even think about it? Dump it into a numerical optimizer, and goto sleep. Wake up and enjoy the sunshine. :-P
by janickg
February 27th, 2007, 11:14 pm
Forum: Programming and Software Forum
Topic: MATLAB varargout question
Replies: 4
Views: 80757

MATLAB varargout question

why even bother passing out the number of outputs? let the first output be a vector X[X] = function(arg1, arg2, arg3, ...)where X = [x1 x2 x3 ...] and so on, let the mechanics inside function construct X, VBA can pull out the vector X and determine its size then.
by janickg
February 27th, 2007, 11:00 pm
Forum: General Forum
Topic: About portfolio costruction optimization
Replies: 3
Views: 79986

About portfolio costruction optimization

I suggest you pick up Frank Fabozzi's "Financial Modeling of the Equity Market: From CAPM to Cointegration", Wiley Finance.
by janickg
February 15th, 2007, 6:46 pm
Forum: Programming and Software Forum
Topic: Multi-Objective Portfolio Optimization
Replies: 1
Views: 80640

Multi-Objective Portfolio Optimization

Just specify the utility function and feed into fmincon for optimization, depends on how you would like to set up your optimization. We can discuss if you'd like.
by janickg
February 15th, 2007, 6:40 pm
Forum: Programming and Software Forum
Topic: Multivariate Distribution Simulation
Replies: 1
Views: 79712

Multivariate Distribution Simulation

Do you really need an exact match? If it varies a little, it's an expected simulation - I don't see anything wrong with that.
by janickg
January 18th, 2007, 4:09 pm
Forum: Student Forum
Topic: When to reject Jarque-Bera test
Replies: 2
Views: 87683

When to reject Jarque-Bera test

SocriticalValue = 5.9915pValue (from your stats) = 5.7361e-007which is <= 0.05 means you reject that your data is normally distributed
by janickg
January 18th, 2007, 4:05 pm
Forum: Student Forum
Topic: When to reject Jarque-Bera test
Replies: 2
Views: 87683

When to reject Jarque-Bera test

Well you need to calculate the critical value from a chi2 (1-0.05) then get the p-value 1- chi2 cdf of the JB statistic number you got.If 0.05 >= p-value then reject the null hypothesis at significance 0.05
by janickg
November 15th, 2006, 8:43 pm
Forum: Student Forum
Topic: portfolio variance
Replies: 1
Views: 88673

portfolio variance

Some thoughts: if you directly start from the bottom-up approach, you might be leaving out fees that get incorporated into the returns of a fund when aggregated and reported, that may affect the variance at a fof level.
by janickg
October 4th, 2006, 9:58 pm
Forum: Careers Forum
Topic: investment bank list
Replies: 8
Views: 92290

investment bank list

<t>Maybe, but nevertheless the forum partially facilitates insiders to share knowledge and discuss / help initiates (or enable initiates to engage in some form of discussion and obtain feedback from insiders)." You want to work in an IB but don't know their names ??" - one has to start somewhere, wh...
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