Companion files
A Practitioner’s Guide to Debt, Credit Structures and What a Property Is Worth to a Lender
These are the four Excel workbooks that go with the book. Every figure the book prints is reproduced in them by a live formula rather than a typed constant — change the rent, the yield, the loan or the smoothing coefficient and every dependent number moves. Each one ends with a Checks sheet setting the printed figure beside the computed one: 130 controls in all, every one green. If a control ever reads FAIL, the workbook is wrong, not the book.
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Chapters 1, 2, 3 and 15
The bridge of Chapter 2, with each of the three adjustments on its own switch. Turn the over-rent strip off and watch 82,204,444 climb; turn the yield widening off and watch it climb further. The sheet also prices each adjustment on its own, so you can see which part of the 37,800,000 gap you are actually arguing about — and, in practice, most disagreements collapse onto one line.
The second half turns the bridge into the option of Chapter 3. Recovery is market value times a compound factor; the loan is whole above a strike of 105,109,489, twelve per cent below today's value rather than forty. The payoff table runs from 140,000,000 down to 80,000,000, and a separate block works the bridge backwards to the income fall at which the lender begins to lose: 12.4 per cent from market rent, 19.6 from passing.
Chapter 4
Loan-to-value, debt service cover and debt yield on one sheet, each solved for the movement in income or value that breaks it, and ranked. The binding test is named by formula, not by opinion, and the sheet writes the one line a credit paper should carry: binding test: loan-to-value, breaching on a 7.7 per cent fall; debt yield second at 8.6 per cent; debt service cover is not a constraint.
Then the shocks: 200 basis points on the rate takes cover from 1.43x to 1.08x on an asset whose income has not moved by a euro; twenty-five basis points of yield is worth 4.8 per cent of value, which is most of the headroom in a loan-to-value covenant. The cure block prices the paydown, and the last sheet runs the same engine on three loans side by side so you can watch the ranking flip when the asset yields more and the debt costs more.
Chapters 8, 9 and 10
Thirty-eight loans, one row each, and every summary statistic computed from the rows rather than typed above them — which is the point of the chapter. Edit a balance and the weighted averages, the concentration table and the maturity profile all move.
The structure sheet carries the seven tranches with their attachment and detachment points and allocates a loss you drive with a default rate and a severity. The three cases of Chapter 9 are computed alongside: Alder Point defaulting alone costs the pool nothing, because recovery exceeds the loan; a recovery of 60,000,000 costs 0.97 per cent of the pool and takes 16 per cent of class G and nothing else; five simultaneous defaults at 25 per cent severity wipe class G out and take 18.7 per cent of class F, and still do not reach the BB tranche.
The last sheet is the mechanism that does the most damage and is least understood: the appraisal reduction. A valuation of 88,000,000 produces none. At 70,000,000 it produces 11,200,000, the servicer stops advancing interest, and control moves up the stack — all before a single euro of loss is realised. The sheet names the controlling class for whatever loss you have set.
Chapters 17 and 18
Two reported gross values and one coefficient, and the smoothing comes out: 486,000,000 reported becomes 468,000,000 true, an overstatement of 3.7 per cent that the leverage turns into 9.2 per cent of net asset value, because the debt does not move.
Which means the ten per cent discount on offer is 0.85 per cent. The sensitivity table runs the coefficient from 0.40 to 0.80 — the honest presentation, since the coefficient is the one judgement in the calculation — and the workbook also solves for the coefficient at which the discount vanishes entirely. Add the bottom-up correction for Alder Point's over-rent, which is a different kind of adjustment and additive to this one, and the buyer offered a ten per cent discount is paying a 1.1 per cent premium.
| Blue text | a hardcoded input — you may edit these |
| Yellow fill | an input cell; everything else on the sheet is a formula |
| Black text | a formula — do not overtype these |
| Checks sheet | the printed figure beside the computed one, with a PASS or a FAIL |
A workbook that agrees with a book proves nothing on its own — the author wrote both. What the Checks sheets do is different: they force the model to reproduce a number that was printed before the model existed, from a formula rather than from the number itself. Building them for this book found three figures in the manuscript that did not survive the test, and all three were corrected before publication rather than quietly adopted.
Where the book states a convention that the arithmetic can be read two ways — the rounded 0.685 recovery factor of Chapter 3 against the exact 0.68504 of the bridge — both are shown, and the workbook says which one the printed table used.
The workbooks open in Microsoft Excel, LibreOffice Calc, Google Sheets and Numbers. They use no macros and no add-ins, so nothing needs to be enabled or trusted. If your spreadsheet asks to update links on opening, decline — there are none.
The other books with companion files. The full list of titles is on the author page.