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by qxiaking
February 2nd, 2007, 4:42 pm
Forum: General Forum
Topic: do old quants just fade away?
Replies: 18
Views: 83129

do old quants just fade away?

Some old quants are so good, they stay as long as they're still interested of what they're doing. My advisor is 60 years and is still enjoy his life as a quant/professor
by qxiaking
August 2nd, 2006, 9:19 pm
Forum: General Forum
Topic: Help on time-changing!
Replies: 2
Views: 97044

Help on time-changing!

It's more or less related to the scaling property of Brownian motion, which relates the stochastic change in time to stochastic change in space. Thus, we have the stochastic volatility.
by qxiaking
August 2nd, 2006, 9:19 pm
Forum: General Forum
Topic: Help on time-changing!
Replies: 2
Views: 97044

Help on time-changing!

It's more or less related to the scaling property of Brownian motion, which relates the stochastic change in time to stochastic change in space. Thus, we have the stochastic volatility.
by qxiaking
May 9th, 2006, 2:08 pm
Forum: Student Forum
Topic: Help on calculating an integral
Replies: 2
Views: 106424

Help on calculating an integral

Lucetios,It seems to me that we could find the expection of the integral. To make it simpler, if you take t_0=0, and t=T, you may find E(\int_0^T \int_0^T {w_u w_s} dsdu) = T^3/3.Hope this helps.
by qxiaking
April 14th, 2006, 3:22 am
Forum: Technical Forum
Topic: correlation to copula
Replies: 3
Views: 110824

correlation to copula

I guess that you don't need to use PCA. All you need is the pairwise correlation between different names.
by qxiaking
April 3rd, 2006, 3:32 am
Forum: Technical Forum
Topic: Another Ito process question (God bless Ito)
Replies: 2
Views: 113838

Another Ito process question (God bless Ito)

This is part of the proof of classic Girsanov theorem. You may find it in many standard stochastic calculus book, like Steven Shreve's book.
by qxiaking
January 25th, 2006, 11:56 pm
Forum: Careers Forum
Topic: Anyone knows the conpensation level in Tokyo?
Replies: 17
Views: 123555

Anyone knows the conpensation level in Tokyo?

The food and night life there are great ! Taken as Bonus ?
by qxiaking
January 13th, 2006, 1:33 am
Forum: Careers Forum
Topic: Which is better for a fresh Ph.D working as a quant? IB or HF?
Replies: 9
Views: 124320

Which is better for a fresh Ph.D working as a quant? IB or HF?

So, once they hire you, they want to keep you as long as possible,given you proved yourself to be valuable.
by qxiaking
January 12th, 2006, 7:42 pm
Forum: Careers Forum
Topic: Morgan Stanley phone interview - quant. position
Replies: 3
Views: 124309

Morgan Stanley phone interview - quant. position

What if it's FID?Thanks for your input, Rico
by qxiaking
January 12th, 2006, 5:22 pm
Forum: Careers Forum
Topic: Which is better for a fresh Ph.D working as a quant? IB or HF?
Replies: 9
Views: 124320

Which is better for a fresh Ph.D working as a quant? IB or HF?

<t>DCFC, Thanks for your detailed summary Really appreciated!I was asked this question in a recent interview (an IB). I'm wondering what they are trying to get from this question. Are they simply want to know your future career plan? Or are they trying to judge whether you'll quit for HF after a sho...
by qxiaking
January 12th, 2006, 12:43 am
Forum: Careers Forum
Topic: Which is better for a fresh Ph.D working as a quant? IB or HF?
Replies: 9
Views: 124320

Which is better for a fresh Ph.D working as a quant? IB or HF?

Look forward to that ...BTW, what's FO?
by qxiaking
January 11th, 2006, 1:33 pm
Forum: Careers Forum
Topic: C/C++ certificates
Replies: 31
Views: 140670

C/C++ certificates

Hi, DCFCCould you email me the lecture notes for "C++ for interviews". qxiaking@yahoo.comThanks.
by qxiaking
January 11th, 2006, 12:58 am
Forum: Careers Forum
Topic: Which is better for a fresh Ph.D working as a quant? IB or HF?
Replies: 9
Views: 124320

Which is better for a fresh Ph.D working as a quant? IB or HF?

Just out of curiosity, could you describe what would your normal working day be like? Except for answering question on wilmott
by qxiaking
January 10th, 2006, 8:48 pm
Forum: Careers Forum
Topic: Which is better for a fresh Ph.D working as a quant? IB or HF?
Replies: 9
Views: 124320

Which is better for a fresh Ph.D working as a quant? IB or HF?

Hi everybody,Could some senior quants shed some light on the difference between working as a quant in Investment Bank and in Hedge Fund?Thanks for your input !
by qxiaking
January 10th, 2006, 8:39 pm
Forum: Student Forum
Topic: Girsanov Problem
Replies: 0
Views: 123370

Girsanov Problem

Hi all,I have a question related to the Girsanov Theorem.Is it possible for us to find N(-1/2) by Girsanove Theorem?By saying so, I mean do a measure change for original brownian motion.Thanks for your input Qing
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