It seems like the market has become addicted to low interest rates. Every time there is a hint that interest rates will go up, the market goes down, and then the federal reserve gets spooked and doesn't go through with the hike.
At one time, it was the Federal Reserve's job:
"to take away the punch bowl just as the party gets going"
At one time, it was the Federal Reserve's job:
https://en.wikipedia.org/wiki/William_McChesney_Martin