Margin calls anyone? I don't know about any mutual funds blowing up and wouldn't, not being in that loop. I have heard some rumors and some flat out statements around the net about margin calls and some ugly aftermaths. Some stocks have taken huge hits, rmbs, tasr, today gnta down 40%, lexr, bocx.pk, vaph.pk and so on. This is more than a dip now and can start feeding on itself real easy. I couldn't say what happens on Monday or Tuesday anymore than a coin toss but my sentiment readings, good news is bad, mo-mos getting sold off etc. imply that any rallies are going to be slow getting off the ground. When in doubt get out might be worth thinking about. I set stop losses at minor profits on swing trades and so far have only been stopped out a few times but I chose carefully in the first place and most have held up. But I'm not going to count the chickens yet for a while.
Don't use it myself and am still about 80% in but most in LTBH's that have barely twitched.