[bhupy]

Sure, we have seen "anomalous" years for median earners from time to time, but it's important to remember that over time real median income has still been increasing as a function of the business cycle — I.e. the first derivative has always been positive during bull economies (see: FRED historic data). Sometimes the second derivative is also positive, which isn't uncommon. In 2019, the second derivative was not only positive, it was very positive.