"a negative cycle" is correct and usable in written English.
It refers to a repeating pattern or sequence of events that have a detrimental or harmful effect. You can use it to describe anything that follows a downward spiral or leads to negative outcomes. Example: John's unhealthy eating habits and sedentary lifestyle created a negative cycle of weight gain and poor health.
It's created a negative cycle.
"Political budget gimmicks create a negative cycle that creates the need for more political budget gimmicks," Mr. Sperling said.
The behaviour can lead to a negative cycle of events, with patients becoming ever more afraid because emergency treatment can be more traumatic.
"I'd played about 25 games [for Newcastle] in six seasons, and it seemed as if there was a negative cycle there that I had to break free from.
Antibiotics cause the selective breeding of the more resistant strains, which leads to the use of newer, harsher, more expensive antibiotics, with more side effects, creating a negative cycle.
There is no business that doesn't have a negative cycle.
Inequities in access to health services leave the most vulnerable in a continued negative cycle, as poor health impacts negatively on income generating opportunities and increase the burden of health costs for households that are already struggling to survive.
For simplicity, for some integer, we denote by the terms of a positive semi-cycle of length four, followed by negative semi-cycle with length three, then a positive semi-cycle, a negative semi-cycle, a positive semi-cycle, a negative semi-cycle, a positive semi-cycle, and a negative semi-cycle.
Our findings suggest that addition of high glucose to FFA treated β-cells results in an escalating negative cycle.
"Substantial ongoing deficits," they warn, "may severely and adversely affect expectations and confidence, which in turn can generate a self-reinforcing negative cycle among the underlying fiscal deficit, financial markets, and the real economy...
It becomes a self-perpetuating negative cycle, which our national leadership is struggling to turn around by pumping bailout money into the damaged economic sectors.
