It's impossible to predict what could trigger this but candidates include a credit crunch in China and a much more aggressive pace of Federal Reserve tightening. (businessinsider.com)
Although projections for 2019 and 2020 show a slightly more aggressive pace of tightening than the projections communicated in December, the pace still remains modest. (franklintempleton.lu)
We're growing at a very aggressive pace right now.» (fortune.com)