Jeanette, Lisa, and Larry's blog

I created the ActionScript financial math library on SourceForge.

http://sourceforge.net/projects/flashquant/

http://sites.google.com/site/flashquant/

I have to put examples in Flash up on the sites to really make it look great but it's a great start. The asdoc stuff is there as well as the swc file and the test application.

I just needed one for a project I'm working on. Now everybody can enjoy... if they need one.

My semivariance work was accepted a while back by the Apache foundation for their commons-math project and is now part of the library.

Semivariance was actually part of Harry Markowitz's work on Modern Portfolio Theory, but computers at the time couldn't easily do this. That was a long time ago and now the calculation is very easy to do in Java or any other general programming language. The whole idea of using semivariance instead of variance is that you care about the risk of losing money rather than simply variance. That 20% gain is not a problem, but that 20% loss sure is.

That's where the Sortino ratio comes in instead of the Sharpe Ratio. In any case, semivariance is part of Post-Modern Portfolio Theory and you can now do that calculation easily thanks to my donation to the Apache Commons Math project.

Computing Semi-beta and other statistical items is also easy enough to do, it's really the same idea - what happens in a distribution for some arbitrary where clause in this other distribution. It's a curveball on simple statistics we all learned in junior high school.

Hi again. I know - I havent posted in like forever. We will again now that I've found the password.

Also - I need to change the registrar for ldiamond.com - my email might stop working for a few days if I do. If you get a failure please call me or use my optonline.net email address (same userid).

Thanks!
LD

We flew kites over the weekend at the park. Very Mary Poppins (my wife clued me in). The bank goes broke and they all have lots of time to spend with their families, so the star goes to the park with his family to fly kites and sees the rest of the board of directors there also flying kites with their families. Very Mary Poppins.

If anybody has adaptive cruise control on their car, please let us know if you find it worthwhile to get in a car.

thanks
LD

http://tech.slashdot.org/article.pl?sid=09/02/06/0912213

Fool your friends - tell them you installed Windows 7 and have them try it out for a little while.