'Flux' refers to the action of flowing or flowing out of something. To be in a state of flux means to be in a state of continuous change or movement.

1. The new President brings a sense of stability to a country that had previously been in flux.
2. I had to move house three times this year. I feel like I'm in a continuous state of flux.

1. Unexpected budget cuts have thrown our plans into flux. We will need to regroup, and go back to the drawing board.
2. The markets are in a constant state of flux. That unpredictability comes with high risk, but also high reward.