<t>Hello, everyone,I have a Phd in Physics. It took me about half a year to learn math finance by myself, and finally got an offer in an IB. Now I am working as a quant for an interest rate derivative desk (mostly exotic derivatives). After one year's work, I feel my limited mathematical knowledge m...

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any ideas?

<t>QuoteOriginally posted by: exotiqHere's the method I came up with for 3 planes: assume at full speed it takes a plane 24 hours to go around the world, the island is on the equator and the prime meridian and planes only fly along the equator:1. Three planes leave the island at 0:00, going west, on...

Edit: the same method as rblaser's

It's neat. Thanks, plee.

Induction will do the job.Let's get back to the second part. What's Cov[B_t^2, B_s^2]?

thank you guys. I got 1/3 as well. The second part of the exercise is to find the variance of

well, this is part of Exercise 6.2 in Steele's Stochastic Calculus and Financial Applications on page 93, instead of page 1 or 2. I just wanna confirm my calculation. If you have the answer, please let me know. Thanks.

what's the variance if B_t is the brownian motion?

Hello, everyone.My recruiter arranged a phone interview for me with GS equity portfolio trading group. They are developing an automatical trading system, and need some quants. I am wondering if anyone here had experiences with them? Would you mind to share? Thanks.

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Finance phds become faculty, not quants.

W*dt = d(W*t) - t*dW, then integrate it.