For most of his presidency, Donald Trump’s grade on the Yahoo Finance Trumponomics Report Card was a respectable B. But in one month it has dropped to C, and it may be heading to D.

Since Trump took office, Yahoo Finance has been grading the Trump economy compared with six prior presidents, using data provided by Moody’s Analytics. We use common metrics such as job gains, earnings and stock values, measuring improvements since Trump took office against prior presidents at the same point in their first term.

The coronavirus outbreak and the business shutdowns it has caused have dramatically eroded Trump’s standing against other presidents. Before the outbreak, Trump ranked first in earnings gains, second in manufacturing employment, and third in total employment. This is where he ranks now:

Here’s a breakdown for each of the six indicators we track:

Total employment. In February, job gains under Trump totaled 6.8 million, third best after Jimmy Carter and Bill Clinton at the same point in their presidencies. But massive job losses during the last two months have wiped out all those gains and more, for a net job loss under Trump of 14.6 million. That’s the worst performance of any of the seven presidents, going back to Carter, by far. The second worst performance was a loss of 1.3 million jobs at the same point in George W. Bush’s presidency, followed by 221,000 job losses under Obama. Both of those presidents began their first terms with a troubled economy. Trump, by contrast, inherited a relatively strong economy.

Manufacturing employment. Manufacturers have shed 881,000 jobs under Trump, which is not as bad as the 2.8 million lost under George W. Bush or the 1.2 million lost under his father, George H. W. Bush. But data during the next two months is almost certain to show many more lost jobs, so Trump could fall another notch or two here.

Average hourly earnings. Trump’s record here is the best, and it will probably stay that way. Wages tend to be “sticky,” even during downturns, since employers are more likely to shrink their workforce than cut pay. Trump’s strength on this measure probably comes from the fact that he took office in the eighth year of an economic expansion, with the labor market tightening, forcing wages up. Overall, wage growth has slowed during the last 30 years, generating weak numbers for most of the seven presidents.

Exports. This has been a weakness for Trump since he began imposing tariffs on China and other importers in 2018, triggering retaliatory measures that have reduced trade overall. Making that worse, U.S. exports typically fall during recessions, since foreigners buy less American-made stuff.