Nothing compared to 1987.
It's just the market saying "Knock it off!" to the government and it's silly Utopian like fixes.
What is it a 4% drop? Whoopdeedoo!
Buy now, reap later.
Without a correction, then yes, worry.
This silly political interference in the market of late is preventing the correction which is needed to weed out the losers and promote the financial winners, and in the long run will make the correction hurt much more than necessary.
1987 was a crash in an otherwase upwards trend. This one is yet another crash in the middle of a ten year FLAT trend.
That one also took two years to recover.
It will be interesting in seeing where this one leaves us a week from now. It did not happen in a news vacuum.