What you've learned and what's left out

This session teaches nothing new. It picks up the three questions the course opened with and checks they now have answers, lists the mistakes you won't make again, and states plainly what's left out and where to find it.

Back to the three questions from the start

This course's first session closed with three questions for telling whether a decision was investing, speculating, or gambling. Back then they were a warning. Now they're a check, and it's worth doing slowly.

"Can I explain, with concrete data, why I think this is going to work out?"

That session said this was the only hard one of the three, because it requires having data and gathering it takes hours.

Now you know which data and where it lives. You know an income statement is five lines and that operating margin says more than the headline. You know the balance sheet hides the debt and its maturity, and that free cash flow is the hardest figure to dress up. You know a multiple only means something compared against its sector and its own history. And you know how to download all of it free from EDGAR or the Spanish regulator's registers.

And you know that a "beats estimates" headline contains no information, because beating is what 76% to 78% of companies do every quarter.

"Do I know exactly how much I could lose if I'm wrong?"

That session said this one took five minutes to calculate. That was true, and what was missing was how.

Now you know risking 1% and investing 1% are figures that can differ by a factor of twenty. You know a position's size comes from dividing what you accept losing by the distance to your exit point, and therefore that you can't decide how much to buy until you've decided where to sell. You know losing half requires doubling what's left. And you have a sheet with your figure written on it.

"Am I acting on analysis, or on a feeling, a recent streak, or something someone said?"

This was the honesty one, and it still is. What's changed is that you now know why the answer is usually the second.

You know selling what rises and holding what falls is measured across ten thousand real accounts. That the price you paid is the most powerful anchor there is and is irrelevant to what the company is worth. That a run of five losses appears about twice per hundred trades even when the method is good. And that a plan written in advance works where willpower doesn't reach, with ninety-four studies behind it.

The three questions are the same. The difference is they now have answers.

That is, precisely, everything this course set out to do.

The ten mistakes you won't make again

Each comes from a specific session. If any sounds like something you've done, that's fine: almost everyone has done them, and recognising them is why the previous thirty sessions exist.

1. Reading "beats estimates" and thinking it says something. Three in four companies do it, quarter after quarter, for a decade.

2. Confusing investing 1% with risking 1%. They're different figures, and the gap can be twentyfold.

3. Buying a stock for its 10% dividend yield. It almost always means the price collapsed, not that the company is generous.

4. Believing a P/E of 6 means cheap. It can mean next year's profit will be half.

5. Comparing a supermarket's margin against a software company's. They're different models, and the comparison informs nothing.

6. Selling on a death cross. Across 48 occurrences since 1929, average returns at three, six, and twelve months were positive.

7. Drawing conclusions from ten trades. Seven wins out of ten are consistent with a true rate of 40% and with one of 89%.

8. Changing methods after three losses. Three losses aren't information about a method: they're noise.

9. Believing a historical result without asking how many versions were tried. A few dozen configurations suffice to make one look spectacular.

10. Buying a leveraged product to hold for months. It promises a multiple of each day's return, not the period's, and the gap grows daily.

The pattern uniting them. Eight of the ten consist of mistaking an isolated number for a conclusion. The entire course could be summarised in one instruction: before believing a figure, ask what it's compared against and where it came from.

What a documented trade looks like start to finish

The course's three artifacts — the profile sheet, the risk sheet, and the one-page plan — exist for one specific moment. Here's how they look applied to a decision, whatever it is and whoever decides to make it.

Before

The plan supplies the criterion. What situation is being watched and what has to be true. If the criterion isn't written so another person could apply it, it isn't a criterion yet.

The risk sheet supplies the size. The accepted percentage divided by the distance to the exit point gives the number of shares. Not the other way round.

And the logbook supplies what appears on no statement: what's expected to happen and on what data, what would have to occur for that reading to be wrong, and what state of mind the decision is being made in. Written beforehand, and not edited afterwards.

During

Nothing. That's the part least often mentioned and the hardest: if the scenario and the invalidation point are written down, the work is already done and what remains is checking whether they happen.

It's precisely what the research on written plans found: their strongest effect isn't on starting something, it's on stopping it derailing along the way.

After

What happened, without decoration. And the question separating learning from self-justification: was the reasoning correct given the information available at the time?

That question has two possible answers and neither depends on the outcome. Good reasoning with a bad result requires changing nothing. Bad reasoning with a good result does, and it's the most dangerous case because it doesn't hurt.

Why this is the only thing that accumulates

After a year, the individual trades don't matter. What remains is a record answering a question nothing else answers: do the failures come from reasoning badly or executing badly?

Two problems with opposite solutions. And without a record written beforehand, they're indistinguishable.

What this course leaves out, on purpose

A course claiming to cover everything would be lying on its last page after thirty sessions teaching scepticism. Here's what isn't here, and why.

Taxation outside Spain. The relevant guide covers the Spanish framework and gets reviewed every January. For any other country the rules differ, and we don't know them well enough to write them.

Trading derivatives. The course explains what an option is, what it was invented for, and why buying and selling one aren't symmetrical. It doesn't explain how to build positions with them, and that's deliberate: it's the terrain where money is lost fastest without understanding what got signed.

Fixed income in detail. It appears as an asset category and as competition for equities when rates rise. Its own mechanics — duration, curve, credit quality — would fill another course entirely.

Property, commodities, and crypto beyond its legal framework. Each has a distinct logic and deserves being treated properly or not at all.

Comprehensive financial planning. Retirement, insurance, inheritance, wealth taxation. That's the work of an advisor with your situation in front of them, and this course can't see it.

And most important of all: nobody can teach you to be right. Not this course and not any other. What can be taught is deciding with more context, sizing risk, and knowing when a number doesn't say what it appears to. Any material promising the first is describing something that doesn't exist, and the previous thirty sessions have given you more than enough tools to spot it.

Where to continue with primary sources

The best recommendation this course can make is that you stop reading secondhand material, ours included, and go to the sources.

Free, from regulators

Spain's CNMV publishes investor guides, its official registers of authorised firms, its list of warned firms, and the public list of qualifications meeting its Technical Guide 4/2017. It's where to go if you're considering genuinely regulated training.

The Bank of Spain publishes financial education materials, the average interest rates on cards and mortgages quoted in the chapter on your money, and the Household Finance Survey, which measures Spanish households' income, wealth and debt every two years.

Free, straight from the companies

EDGAR, the SEC's database, holds every filing from US-listed companies. No registration, no cost. It's the original source of everything the media later reports, and practically nobody opens it.

The academic work this course has cited

All are findable by title and authors, and several are openly available.

Topic	Work
What percentage of day traders lose money	Barber, Lee, Liu, Odean and Zhang (2020), Learning, Fast or Slow
The cost of trading too much	Barber and Odean (2000), Trading Is Hazardous to Your Wealth
Selling gains and holding losses	Odean (1998), Are Investors Reluctant to Realize Their Losses?
Why price stalls at round numbers	Osler (2003), Currency Orders and Exchange Rate Dynamics
Whether technical analysis works	Park and Irwin (2007), What Do We Know About the Profitability of Technical Analysis?
How many holdings diversification needs	Evans and Archer (1968), and the later revisions by Statman and Benjelloun
Why a written plan works	Gollwitzer and Sheeran (2006), Implementation Intentions and Goal Achievement
What happened when factors were replicated	Hou, Xue and Zhang (2020), Replicating Anomalies
Why a spectacular backtest means nothing	Bailey, Borwein, López de Prado and Zhu (2014), Pseudo-Mathematics and Financial Charlatanism

Going to the source has one advantage over any summary, this one included: you can check whether whoever told you got it right. That's exactly the capability this course has tried to give you, and applying it against us is the best use it can have.

And that's it

Thirty sessions. They began with the figures on how many people lose money investing, which is an uncomfortable place to start and the only honest one. They end here.

There's no diploma, no certificate, no accreditation. It was said in the first session and it remains true: Volatly is a private company, not an academic institution, and the only things leaving this course are what you carry in your head and the three sheets you filled in along the way.

What has changed is checkable. You can open a quarterly report and know where to look. You can describe a chart without making anything up. You can read an earnings event before it happens and explain the scenario in words. You can calculate how much to risk and say why that figure and not another. And you can read an accuracy percentage and know what to ask before believing it.

That last capability is the most useful of all, and the least taught. It works on anything put in front of you from now on — including what we do, which is exactly as it should be.

The one thing this course hasn't saved you is time. Reading an event by hand, cross-checking it against expectations, and writing the reading before it happens costs two to three hours per company, four times a year, on Spanish night-time hours. You know how to do it. And you know exactly what doing it across a whole portfolio would cost.

Published August 3, 2026. Last reviewed: August 3, 2026.

Back to the start: the full syllabus · Reference guides: investment taxation in Spain · the dividend, start to finish · order types and how they execute