About

I'm Sung Chang— an ex-Google engineer who has spent 10+ years building consumer products, and who invests his own money for real. Kamtra is the tool I'm building to become a better investor, in public.

I write here as an explorer, not a guru. I don't think I have the answers. What I have is a decade of building products, a habit of questioning my own decisions, and a genuine stake in getting investing right — because I'll be doing it for the rest of my life.

These posts are field notes: what I'm testing, where I went wrong, and what the data on my own behavior keeps telling me. If that's useful to you too, even better.

Kamtra

Kamtra helps investors measure their edge and master their psychology — not another returns tracker, but a tool for growing into a calmer, more principled investor. Read the blog →

Nothing on this site is financial advice. It's a personal record, shared in the hope it's useful.