I haven't checked yet to see how much I've "lost". I had a gut feeling that things were going to fall though, mainly because my portfolio hit a new milestone about a month ago, breaking the $400K barrier. Last time I added everything up, I was up to around $413K, but that was before the market started slipping.
When we had that little hiccup back in February, I think it put me down about 8-9% for a moment, but it bounced back pretty quickly. That didn't even faze me. When we had that little correction last summer though, it was a bit more disturbing. Mainly because I co-signed on a car loan for a good friend of mine, and I swear, within a month, he became deathly ill and the market started to tank. I was more worried about him dying than the market going down or the possibility of getting stuck with a dead man's car payment, but everything just sort of compounded, and made the situation worse.
Thankfully, my buddy recovered and got out of the hospital. Oddly, he got out about the same time as the market recovered to where it had been before the start of him getting sick/the "correction".
This time around, I'm not sweating it. In fact, I just upped some of my automatic monthly investments, in the hopes of taking advantage of it.