1,144 reputation
1622
bio website linkedin.com/in/bjansen
location Netherlands
age 27
visits member for 2 years
seen 21 mins ago
stats profile views 281
  • Consultant @ Veneficus
  • Interested in the combination of Finance and Computer Science
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17h
comment VaR for portfolio of funds
Do you want to incorporate market inefficiencies such as the trading costs each fund makes?
May
4
comment Obtaining a consistent covariance matrix for stochastic volatility processes
Multivariate GARCH seems to be a good fit to your problem. Do look at this answer for some further information and warnings.
Apr
29
comment How to calculate unlevered beta
Pages 53 and 54 of Volume 4 of the CFA level curriculum. I'm not sure where you're getting your formula but my book states $\beta_{\textrm{asset}} = \beta_{\textrm{equity}} \frac{1}{1+(1-t){\frac{D}{E}}}$.
Apr
9
comment Iterating through every path of a Trinomial Tree
Can you describe the data structure of your tree? Is the tree recombining?
Mar
28
comment Calculating the probability of a price change using an options pricing formula
@SRKX you're right, I'm assuming too much. Still a warning: do not mix measures!
Mar
26
comment Calculating the probability of a price change using an options pricing formula
Note that this probabilty is under the risk free measure.
Mar
23
comment Why the implied volatilities calculated are so different
I know and often do but these dumps without coming back are quite irritating. Despite heavy editing by other editors there still was an error. This doesn't help anyone :(
Mar
21
comment Central Limit Theorem and Lévy processes
My answer was based on a misunderstanding of the question. So that's gone, however I'm still not sure I understand your answer. I will upvote once I know it is correct.
Mar
21
comment Central Limit Theorem and Lévy processes
I retracted my up vote because I think compared to my own answer your answer complicates things unnecessarily. I find it difficult to check it is even correct.
Mar
20
comment Why the implied volatilities calculated are so different
I vote to close it as long as the table on top isn't cleaned up. A clear table will allow simple answering by anyone with a implied vol calculator
Mar
20
comment Central Limit Theorem and Lévy processes
You're welcome. The edit wasn't any trouble at all.
Feb
28
comment Optimization procedure for entropy pooling
Can you show us your data?
Feb
16
comment How to improve the Black-Scholes framework?
I'd rather see you make your question more specific and accept the answer instead of the other way around.
Feb
13
comment Why do we use GARCH(1,1) to predict volatility?
I don't mind at all.
Feb
13
comment Why do we use GARCH(1,1) to predict volatility?
Another drawback of GARCH is that it is impractical to estimate multivariate GARCH so you can't really use it with more than a small number of assets.
Jan
30
comment Predict Quadratic Trend in Time Series
This should fix it but Dylan Koh should review the changes
Jan
3
comment How to cluster ETFs to reduce cardinality for portfolio selection
The description says it works on sparse matrices. How does the complete process you used look like?
Jan
3
comment Using the termstrc package in R
The author mailed me that this change will be considered for the next revision of the package.
Jan
3
comment How to cluster ETFs to reduce cardinality for portfolio selection
I fixed the link.
Jan
1
comment Using the termstrc package in R
I've mailed the package maintainer and added that last line to my answer.