I about freaked out this morning. My Fidelity mutual fund I've been buying for ~15 years all of a sudden lost 90% of it's value in a day! that was 1/3 of my entire portfolio down the drain!
After some research, I found that they did a 1:10 split. My stock shares owned hasn't reflected this change as of yet, so it appeared that I just lost my ass, but in reality I am even. And probably going to be up soon enough, as for some reason the price makes it look like it's a heck of a buy right now, even though the stock has been diluted accordingly.