I think the fact that it came AFTER the SOTU address is our clue that they were not responsible for manipulating it ( so overtly .... obviously the market is manipulated on a regular basis by people like "marker makers") and such but I think that the market was too high to begin with . Anyone who has been investing for any length of time will tell you that a stock cannot continue to go up and up and up so quickly without a market correction - it's simply a matter of profit taking - when a market gets to certain point - investors believe that it cannot sustain and "taking profits" by selling their inventory - typically moving it into a stock that still has room to grow - this way they capture their gains - limit their losses ... and still have money in play.

You can only watch the market go so high before you realize that it cant sustain much longer - same exact thing happened with BTC , and I told everyone that there was no way it could stay that high .. and now look at things... people sell off our of fear , greed, or because they already picked an exit point... but I think the correction was a natural response to a market that rose to high , too quickly and that people will go right back into it -

what I don't hear anyone talking about is that the very next day the market regained 50% of its losses and was one of the biggest trading gains in recent history - but the media doesn't want you to know that - they want you to think that Trump broke the stock market ...