4 | Federal Reserve raises interest rates from 2.25% to 2.5%, December 19, 2018

The 4th Federal Reserve interest rate of the year is for a 1/4 of a point from 2.25, to 2.5.

Quarter? Fourth?  Four?

This comes just before the 105th anniversary of the establishment of the Federal Reserve.

Notice the FR was established on the last day of Saturnalia, traditionally.

https://www.cnn.com/2018/12/19/business/federal-reserve-december-rate-hike/index.html

Look at what the market did after the hike.