The time to buy is when things look there worst. The time to sell is when things look there best. You may not nail the bottom, but scaling in is a good strategy down here under Dow 8000.
How am I contradicting myself? It's the worst number on record since 1949, i.e. ex post. I do not know if it's the worst number that we will be seeing in this downturn, ex ante. My opinion is that the labor mkt hasn't hit the bottom yet, as there's a whole number of leading indicators in the NFP report that are suggesting that employment contraction hasn't actually slowed.