Terms like "depression" are too vague to be useful - and on top of that they're emotionally loaded, especially with fearful connotations, thus using them is an obstacle to rational analysis.
The market is pricing in a sharp drop in activity during Q2 (like 25-30% annualized) followed by a rapid rebound during Q3 and Q4, leaving overall GDP slightly down on the year but well-placed to return to trend. Some sectors (eg cruise lines) may be crippled, many others will leverage the opportunity to cut costs, increase efficiency, and rationalize businesses which may have become flabby, bloated and complacent during the long expansion.
The main risk to this view is that things don't return to normal in Q3, further impairing cashflows, shifting many more businesses into the danger zone where collapse is a possibility, and above all creating fear / reducing confidence to kick off another leg down in stocks (and commodities etc).