Notes and analysis
Quantitative readings on wealth decisions
Short, technical, honest notes. No clickbait.
Featured
Inmobiliario
12 May 2026 · 6 min read
Gross yield vs cap rate: which metric to use when evaluating a flat
Gross yield is only the first filter. To decide whether a property makes sense as an investment you need to read the cap rate.
ReadInmobiliario
28 April 2026
8 min read
Leverage stress test: when a mortgage breaks cash flow
A 3.5% mortgage turns an attractive deal into a negative one sooner than expected. How to model it.
Datos
10 April 2026
5 min read
Using SERPAVI to validate a projected rent
Spain's official rental reference system lets you sanity-check whether a projected rent is realistic.
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