If the question is when markets will recover, a first-pass answer is never.
Notes from Wikiquote
The Economic Fallout (November 9, 2016)
Ronald Reagan stands accused of inflicting a huge burden of debt upon his country.
The usual and basic Keynesian answer to recessions is a monetary expansion.
Quote text and notes from Wikiquote: Paul Krugman (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.