The euro appreciated versus the dollar by almost one percent in the immediate aftermath. U.S. stock markets were up as well. The S&P 500 rose by about half a percent. Finally, 2-year U.S. Treasuries declined by almost 10 basis points. In fact, the entire yield curve shifted down by a bit with long-term bonds (10 years) declining by about 10 basis bonds.
All these indicators thus suggest that monetary policy was eased despite the fact that the Fed hiked interest rates.
2 year US Treasury yield, 5-day chart
The stance of monetary policy cannot be measured by interest rates. Whether monetary policy is easy or tight depends on where the natural rate of interest rate. Now with the U.S. economy approaching full employment, the natural rate of interest is finally moving up after almost a decade where it supposedly below zero. Monetary policy thus actually becomes easier if the Fed does not increase the overnight rate in tandem with increases in the natural intrest rate.
To sum up, the Fed's rate hike was widely anticipated by financial market participants and was thus priced in. Furthermore, various financial market prices suggest that monetary policy actually became somewhat easier. This is most likely due to a to the fact that the Fed made it abundantly clear that the tightening cycle will be very gradual with about two more rate hikes this year, a pace that financial markets feel very comfortable with.