The paper focuses on stratospheric trends of NO₂, a species involved in the ozone equilibrium, using data from four NDACC stations. The global stratospheric NO₂ trend has not yet been established conclusively. We analyse DOAS data from stations in the Northern Hemisphere and Southern Hemisphere during 1993–2014. The most relevant finding is the hemispheric asymmetry found in the sign of the NO₂ trend, providing further evidence of changes in the stratosphere dynamics on the global scale.