Yen is down, Asia is down, Europe is down, and gold, the safe haven, lost 21 dollars since the open. Oil is down and U.S. futures are way down.
Preserve your capital and watch the inverse ETFs for entry. They will probably gap up strong at the open and continue up all day (if the market continues down).
A reader asked my opinion of BOOM. I seldom give opinions on request stocks but it looks to me like BOOM put in a max top on the Friday before last. Of course after the fireworks today it might be a good buy again. But I think after today there might be a lot of good buys or goodbye's - your choice.
Update - I've been reading yet more nonsense this morning about last weeks crash. No one comes right out and says "all of this crap was so severely overpriced that everyone was looking for an exit but didn't want to be perceived as leaving the party early." By that I mean most fund managers would rather kill their first born than miss a quarter profit that another manager achieved. So what was needed was a lightening strike to stampede the herd and in a stampede it is often difficult to tell which steer started running first. The lightening strike in my opinion was Japan raising their core interest rate to .50 basis points which may not seem a lot to you and me but it doesn't take much to bring a house of cards tumbling down.