Five minds. One portfolio. Zero noise.
Five minds
A portfolio
Zero noise
Ask in plain language. Elisa puts it in circulation across the team and Cerebro answers with sources, limits and cost. And it gives a verdict, not an «it depends».
History of this desk
Elisa is an artificial intelligence, not a person. Her answers are generated by an AI model.
This is general analysis and not a personalised investment recommendation. The person who invests is the one who decides. The chat may search the internet when the vault does not know the answer (a figure from today, a recent news item); those internet sources nobody has reviewed them and they may be incomplete or wrong, so check them before acting. The five profiles that sign the answers (Elisa, Jorne, Carlos Bárez, Daniel Ferrer, Inés Torres) are specialisms of one single automatic system: they are not people nor registered advisers.
Tools
Note down your positions and watch how they do. Without an account they are stored only in this browser; with an account, they sync across devices.
What leaves your browser
When you ask in the chat, the text of the question and the history of that conversation are sent. If you have saved reading preferences, the vocabulary level and the depth are sent too. Your saved positions they are not attached to the chat; the portfolio and the scenarios use them in their own sections. That is why answers are general and not personalised: Cerebro is not financial advice. Avoid writing personal or financial data that is not needed. The securities search sends the search text and price queries send the symbols. See the privacy policy to find out which providers there are and what else is used.With your session signed in, positions are are stored in your account: they sync across devices and are deleted with the account. Type the name or the ticker and pick from the list so we know exactly which security it is and which exchange it trades on.
Load portfolio from text
One position per line: TICKER [shares] [price]. The comma works as a decimal point. Repeating a ticker updates it.
Your portfolio starts with one position. Add a security at the top and, if you want, the shares and the entry price.
Scenarios
Two hypothetical accounts with the assumptions you set. They do not predict the market nor rely on your portfolio: they show what what you type implies. If a figure is missing, the screen says: n/a and why. Never a zero that can be read as data.
Search by title or subject; not inside the notes.
Informative translation; in case of discrepancy, the Spanish version prevails. Spanish version
Conflicts of interest
The declaration is made by the person responsible for the site, not by the system. The conflict of interest is theirs: the system cannot declare it on their behalf or make it up.
Positions
The person responsible holds positions in listed securities, and some of them are companies this site publishes analysis on. The conflict flag is declared company by company: there is a public list at [/datos/conflictos.json](/datos/conflictos.json) with the tickers of the securities in which the person responsible holds a position, and every bulletin, every chat reply and every entry in the library that mentions one of them carries that same declaration alongside the content. The list contains tickers only, no amounts: no euros, no pesos, no purchase dates, no position size. It is updated when the site is published, and the date carried in the file itself states how long it remains valid.
What the flag does not cover, and it is worth saying so: it is not a complete inventory of the person responsible's positions in any sense, nor of those held in third-party accounts. It covers the tickers on that list in published text. The fact that a text carries no flag means it names none of those tickers, not that the person responsible holds no position in that security.
The library began as the study notebook of the person responsible, and some notes mention their own portfolio or how a company fits into it. That describes the situation of the person responsible, not yours, and it is not a recommendation. The daily bulletin is written without cross-checking it against that portfolio. And the site does not personalise: it does not know your situation, your horizon, your risk tolerance or your objectives, so the assessment it issues is general and the same for everyone. The details are in [/transparencia/metodologia](/transparencia/metodologia).
Payments
The person responsible does not receive payments from issuers of the securities covered on this site, nor from brokers or financial intermediaries for reports, studies or any other remuneration. No compensation depends on an analysis recommending a particular security.
Revenue
The site's only source of revenue is Google AdSense advertising. The site is free for those who use it: there is no charge for reading, for asking the chat, or for using the portfolio. See [/legal/aviso-legal](/legal/aviso-legal) and [/legal/cookies](/legal/cookies).
Update note 2026-09-30: as of today there is a second source of revenue, Amazon affiliate links for books; they are explained below, under "Affiliate links".
What this is, in one line
General analysis and study material, largely generated by an automated system. It is not personalised financial advice, there is no suitability or appropriateness assessment, and whoever decides is whoever invests. The details are in [/legal/aviso-legal](/legal/aviso-legal) and [/legal/condiciones](/legal/condiciones).
Affiliate links
The page [The Cerebro's books](/libros) and the entries for some investors link to books on Amazon. Those links are affiliate links: As an Amazon Associate, I earn from qualifying purchases. The price for the buyer does not change, and every link is marked as sponsored (rel="sponsored").
This is the site's only affiliate arrangement. There are no affiliate links or referral codes from brokers, asset managers, roboadvisors or any investment product: the CNMV (Spain's securities regulator) considers that being paid for a client referred to an investment firm to be reserved client solicitation (questions and answers on MiFID II, question 22.2, 9 December 2025), and this site does not do that.
Your account
Your portfolio and your saved notes, also on your other devices. Without an account you can keep using the portfolio in this browser. When you delete your account, the associated data is deleted too.
You can also sign in with Google.
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Adjust how we explain it to you
Two optional questions: your vocabulary level and your preferred depth. They are used to adapt the explanation. We do not ask about amounts of money and we do not run a suitability assessment. The answers are generated by the system and may contain errors; these preferences do not guarantee that the result is identical in every case.