The Problem With Wall Street’s Forecasts

Over the last few weeks, I have been asked repeatedly to publish my best guess as to where the market will wind up by the end of 2019.

Here it is:

“I don’t know.”

The reality is that we can not predict the future. If it was actually possible, fortune tellers would all win the lottery. They don’t, we can’t, and we aren’t going to try.

However, this reality certainly does not stop the annual parade of Wall Street analysts from pegging 12-month price targets on the S&P 500 as if there was actual science behind what is nothing more than a “WAG.” (Wild Ass Guess).

The biggest problem with Wall Street, both today and in the past, is the consistent disregard of the possibilities for unexpected, random events. In a 2010 study, by the McKinsey Group, they found that analysts have been persistently overly optimistic for 25 years. During the 25-year time frame, Wall Street analysts pegged earnings growth at 10-12% a year when in reality earnings grew at 6% which, as we have discussed in the past, is the growth rate of the economy.

Ed Yardeni published the two following charts which show that analysts are always overly optimistic in their estimates.