The terror began with Goldman Sachs predicting a 24% decline in second quarter GDP—on an annualized basis. Then Morgan Stanley raised it to a 30% decline. Now Capital Economics is forecasting a 40% decline in second quarter GDP, annualized.

This sounds horrific. During the worst year of the Great Depression, 1932, GDP shrank by only 14%. Is the coronavirus recession really two or three times as bad as that?

The answer is no. Not even close. The gremlin here is the “annualization” of data, which ordinarily serves a useful purpose when analyzing numbers. Annualizing a monthly or quarterly number tells you what the real annual change would be if it changed at that monthly or quarterly pace all year long.

Monthly car sales, for instance, are normally annualized, because there are large seasonal differences in sales. The pace of car sales in February, for instance, was 16.6 million at a seasonally adjusted annualized rate, or SAAR. For the full year of 2019, car sales totaled 17.1 million. So the annualized rate in February tells you the pace of car sales had slowed slightly from the actual number of sales in 2019.

Annualized quarterly GDP forecasts, however, are now making the coronavirus recession sound a lot worse than it’s likely to be. “GDP for all of 2020 will not decline as much as the annualized rate in the second quarter,” Ryan Sweet, director of real-time economics at Moody’s Analytics, tells Yahoo Finance. “Any time you annualize something it’s going to be more volatile than looking at it year over year.”

Rebound later this year

Moody’s Analytics expects second quarter GDP to drop 18% on an annualized basis. That’s a measure of the change in GDP from the first quarter to the second quarter, annualized as if that were the pace of change for an entire year. But the firm only predicts a 1.9% drop in GDP for the entire year, compared with 2019. That’s because a big rebound in GDP is likely later this year. The second-quarter numbers will be terrible, but with luck they’ll also represent a quick bottom, not a trench we’ll be stuck in for months or years.

If that scenario holds, the annualized GDP growth rates for the third and fourth quarter could look as exaggerated to the upside as the second-quarter numbers are exaggerated to the downside—in the range of 15% or even 20%. But real economic activity won’t be growing nearly that fast. It will be a statistical mirage indicating that growth is once again heading in the right direction, but not as wildly as annualized data suggest.

A more measured way of looking at quarterly GDP numbers is to compare them to the same period a year ago. On that basis, Moody’s Analytics expects 2020 second-quarter GDP to be about 4.2% lower than GDP for the same period in 2019—less than one-fourth the rate of change when annualized.