This all depends on what margin you want to demand for your capital put at risk vs. the risk-free alternative. Most professional money managers use a 2x rate not your 3x rate. Not that I disagree with your methodology. I prefer a 2.5x rate generally, although on old-world three letter names rarely mentioned on this fast money non-fundamentals board, 2x is plenty sufficient, while 3x is what I plug in on stuff that's historically cyclical or in an industry that has a history of fundamental disruptive cycles due to introduction of new technologies.
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