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by arnao
December 9th, 2004, 1:07 pm
Forum: Technical Forum
Topic: Fisher Student Statistics
Replies: 3
Views: 167102

Fisher Student Statistics

<t>Thanks for the advice, sure non-normality doesnt help and I was probably wrong to suppose that Fisher and Student tests where robust with respect to non-normality of my data.any references ? (google only returned 3 links for "bootstrapped innovations")what about Mann-Whitney U-test ? ps : actuall...
by arnao
December 6th, 2004, 1:45 pm
Forum: Technical Forum
Topic: Fisher Student Statistics
Replies: 3
Views: 167102

Fisher Student Statistics

<t>I have been using Fisher and Student statistics to test wether a filter/forecast is significant...and I am very disapointed because it seems the fact filter/forecast is significant one week does not imply it will be significant for the weeks after ! (I have checked some basic filters on equity we...
by arnao
November 25th, 2004, 2:06 pm
Forum: General Forum
Topic: Nonlinear Optimization with Constraints
Replies: 26
Views: 173686

Nonlinear Optimization with Constraints

check ASA codeAdaptive Simulated Annealing
by arnao
November 25th, 2004, 2:01 pm
Forum: Programming and Software Forum
Topic: Random Number Generator, Beta testers wanted
Replies: 22
Views: 170670

Random Number Generator, Beta testers wanted

Quote The only requirement is a soundcard, doesn't even need to be connected to anything.Lots of electormagnetic hiss,pops, crackles, clicks appear if you turn the volume up real loud. lol, I didn't realize it was a hoax...
by arnao
November 24th, 2004, 7:39 pm
Forum: Programming and Software Forum
Topic: Random Number Generator, Beta testers wanted
Replies: 22
Views: 170670

Random Number Generator, Beta testers wanted

QuoteBeta testers wantedso what do you want beta tester to do ? could you talk about hardware requirements for your test.
by arnao
November 23rd, 2004, 7:58 pm
Forum: Programming and Software Forum
Topic: Random Number Generator, Beta testers wanted
Replies: 22
Views: 170670

Random Number Generator, Beta testers wanted

Do you mean you need computer time to produce random numbers ?I'm ok to let my computer crush numbers at night for some time, if you give source code for your prg.
by arnao
November 5th, 2004, 10:12 am
Forum: General Forum
Topic: macroeconomic modelling
Replies: 10
Views: 171195

macroeconomic modelling

<t>have a look at tramo/seats methods.tramo and seats are especially usefull with montly data and can forecast 24 months ahead with confidence interval.you can find free public implementations : google Demetra and TSW.Once you have forecasts, you want to statistically test whether these forecasts ar...
by arnao
October 27th, 2004, 3:17 pm
Forum: Student Forum
Topic: What is "selection bias"
Replies: 5
Views: 171671

What is "selection bias"

<r>I agree there are few relevant papers that effectively quantitfy survivor bias or selection bias.Do you know any good links to address these issue ? <URL url="http://www2.standardandpoors.com/NASApp/cs/ContentServer?pagename=sp/Page/IndicesIndexPg&r=1&l=EN&b=4&s=6&ig=51&i=...
by arnao
October 14th, 2004, 1:56 pm
Forum: General Forum
Topic: multifractal generator
Replies: 1
Views: 171909

multifractal generator

Which generators could we use with sensible fit to actual average US stock daily price history ? (i.e. generator properties) Do you know any ref. in this matter ? (apart from B.Mandelbrot)
by arnao
September 28th, 2004, 12:27 pm
Forum: General Forum
Topic: Poll: What's the best strategic asset allocation to return 5-6% real over time?
Replies: 21
Views: 177765

Poll: What's the best strategic asset allocation to return 5-6% real over time?

<t>In fact I was trying to identify the portfolio located in efficient frontier (accros all investment asset classes) which will lead over next 20-30 years to 5%-6% return on investment, with no need rebalancing...Of course If you can borrow at X% and be sure you can earn X%+e% on a consistent basis...
by arnao
September 26th, 2004, 11:19 am
Forum: General Forum
Topic: Poll: What's the best strategic asset allocation to return 5-6% real over time?
Replies: 21
Views: 177765

Poll: What's the best strategic asset allocation to return 5-6% real over time?

in my humble opinion, your target allocation may be:30% real estate30% bonds20% common equity (msci world)10% private equity10% commodities (included hedge funds)generaly speaking, equity, real estate, (commodities ?) are linked with inflation so you can actually hedge % of inflation risk.