RE: Depreciation28 Jun 2023 19:07
I've managed to find my old calculation, so I'll quote it here. Note that the 5.3% mentioned below was the dividend yield at the time, and the dividend cover at that time was 1.5x.
'It seems to me that, for the business model to be sustainable, we should be treating part of the reinvestment of surpluses as providing for the eventual replacement of exhausted assets, at the end of their 30 year life. Based on a very rough calculation, it seems to me that about 1.6% of capital should be reinvested per annum to cover this replacement. (An asset life of 30 years would simplistically suggest replacement of 1/30 of capital per year, or 3.33%. But these replacement assets will be earning reinvestable surpluses over their lifetime; assuming a real return of 5.3% compounded, I reckon that reduces the required 3.33% to about 1.6%.) If we take market capitalization to be roughly representative of capital, that means reinvesting 1.6% of share price to cover replacement. At present the surplus cover (over dividend) is about 0.5 x 5.3% = 2.65% of share price. But if we say that 1.6% out of that 2.65% must be spent on replacement, and is therefore not "real" cover, then the real cover (after making provision for replacement) is only about 1.2x instead of 1.5x.'
Based on this, I should have said that the cover needed to pay for asset replacement is 1.3x, not the 1.2x that I wrote in my previous comment here. Obviously that figure should be treated as a very, very rough idea.
The '5.3