An excellent article from CFEE explaining in plain English the multitude of factors why markets coughed and stumbled this week.
"For those who have been investing for a while now, the reaction may be, “Oh no, here we go again.” After a long period of increases, stock markets have been tumbling. Like a roller coaster, the ride up can be so much slower than the ride down. Climb, climb, climb … and then plunge. The question is, why now?" There are a number of factors at work."