I've seen charts that plot safe (or perpetual) withdrawl rate over time. I understand what the metric is measuring and how one would err on the side of caution based on their own risk tolerance. It's a very useful chart, but I think it could be improved when comparing multiple equities/portfolios.
Has anyone seen a metric where you run say a Sortino or Sharpe calculation, not on the stock price movement, but rather on it's safe withdrawl across rolling time periods?
I think that metric would prove extremely useful as a comparison tool. It would of course be borderline too academic, but it would still be a neat data point.