Portfolio
What I own, and why
My own positions, with real money and in the open. Each one carries the reason I opened it, written before knowing how it would go, and the risk I think it has.
Nothing published yet
There are no positions on this page yet. It goes up when there is a position with a thesis worth reading, not before.
- Each position with its shares, the price paid and the date.
- The thesis: one or two sentences on why I bought it.
- The main risk of that position.
- What the positions are worth today, with delayed prices.
- A chart built from one snapshot per trading night.
What a position looks like
This is the documented example inside the file — not a real position. It is checked by the same schema as the real ones, so it can be copied as it is.
{
"ticker": "NAFTRAC",
"nombre": "NAFTRAC (ETF del IPC)",
"mercado": "BMV",
"historyPair": "NAFTRAC",
"entrada": {
"fecha": "2026-09-01",
"precio": 60
},
"cantidad": 100,
"peso": null,
"tesis": {
"es": "Ejemplo: aquí va la razón por la que compré, en una o dos frases y con mis palabras.",
"en": "Example: this is where the reason I bought goes, in one or two sentences and in my own words."
},
"riesgo": {
"es": "Ejemplo: aquí va lo que más puede salir mal con esta posición.",
"en": "Example: this is where the main thing that can go wrong with this position goes."
},
"estado": "abierta",
"salida": null
}What I am holding myself to
- The thesis goes up when the position is opened, and it is not edited afterwards to look smarter.
- A position that loses money stays on the page, with its exit price and its date.
- If a company on this page also appears in my research, both pages say so.
- Every position on this page carries its thesis, its size and its weight. What is not published is my account balance, and this page is not a statement of net worth.
How this page is built
-
The positions live in a JSON file in the site’s code, which has been private since 6 September 2026. I edit it by hand and write the thesis and the risk myself; nothing here is generated by AI.
-
The file is checked against a schema on every build. A missing date, a price that is not a number or a closed position without an exit price stops the deploy instead of publishing a wrong figure.
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Prices come from the site's own endpoint, which reads Yahoo Finance and caches it. They are delayed, and the page says by how much right next to the figures.
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Every trading night a scheduled job works out what the portfolio is worth and writes one line into the repository. That file, and nothing else, is what the chart draws.
Full site methodology → My Actinver Challenge portfolio (fictional money) →
Educational, not advice
I am a student publishing my own positions to learn in the open. This is not financial, investment or tax advice, and it is not a recommendation to buy or sell anything. I hold the positions listed here, so read them as what they are: an interested party's opinion, with the interest declared. Prices come from Yahoo Finance with a delay and can be wrong; check them at the source before deciding anything.