Subject: Re: Protecting the Downside
I need to sit down and look at what I have invested and what would happen if there is a 20%, 40%, 60% drop in the market.

It's not really the drop that matters. It's the drop combined with projected withdrawals. The former recovers in time. The latter if severe enough will not recover. There's a whole body of literature and much discussion on Bogleheads and other finance forums regarding this challenge.