Bolsia portfolio grows nearly 400% in five years

One portfolio accumulates nearly 400% in five years

Can you quadruple your capital in the stock market in five years without being a genius? On the Bolsia.com platform, one portfolio claims to have done exactly that: it has accumulated a 396.39% return with a declared balance exceeding 500,000 euros, according to the platform's own public records. Previously, it hit returns of 286.82%, 293.8%, 303.66%, and 305.75%. Every climb in May was celebrated as a new record. The result is on the table; what remains unclear is the reasoning behind it.

Luck or talent? Finding the winner among 3,000 portfolios

The Bolsia.com ranking brings together around 3,000 portfolios—2,700 according to another estimate—and one of them has to win. The skeptical calculation is immediate and doesn't require a computer: if you pit thousands of portfolios against each other for five years, statistics will eventually produce a winner. The classic comparison is that of the monkeys and Shakespeare, and the discussion adds an even sharper one: the best portfolio in a lottery draw yields 5,000%, yet no one calls the winner a fund manager. It is textbook survivorship bias.

The doubt boils down to a very specific request: check the performance of 3,000 random portfolios over the same period and compare it to the best. If the random result looks like the real one, there is nothing to discuss. If it doesn't, then someone has a method worth investigating.

Against the thesis of pure chance, the numbers weigh heavily. Five consecutive years, with an annualized return of around 30%, is not a weekend streak. In that same ranking, most portfolios lose money or underperform the market: choosing correctly among thousands of possibilities does not seem so trivial when the outcome is still unknown.

What is inside the portfolio: Amazon, Apple, Nvidia, Netflix, and Google

The inventory disappoints those expecting a secret strategy. The portfolio relies on Amazon, Apple, Nvidia, Netflix, and Google, with Tesla and PayPal as companions and Microsoft notably absent, which some see as a beginner's oversight. In practice, it is a textbook tech bet, the kind that any fund has held in its top positions for years.

From this comes the most repeated objection: that the merit isn't great if all one did was buy the big tech stocks and wait. The counter-argument is clever: if it was so obvious, why didn't anyone buy Twitter? Why didn't all the portfolios on the platform end up concentrated in those same five companies?

Beneath the debate lies a question of methodology that is often overlooked. A stock can remain flat for a year and move 1,000% along the way. A fund that holds it steady earns zero; someone who buys and sells at the right intervals earns much more. The final return says less than it seems: the relevant factor would be how it was obtained and whether that method holds up when the market stops providing easy gains.

Other portfolios with similar success labels

The winner is not alone. One portfolio focused almost exclusively on the IBEX 35 (Spain's benchmark stock index) has accumulated 197.93% and, according to the thread, has turned 100,000 euros into 300,000. Another, supported by German blue chips, boasts a 100% return in eight years including dividends. A third recognizes a 25% return over a decade, despite a move and a separation in between.

The comparison between these cases is the most useful part of the matter. All the previous figures are large in absolute terms and all belong to bull market periods, with US tech stocks leading the way. When the wind is at your back, almost any decent portfolio looks like the work of a professional. The problem is that the wind changes.

What happens when the market stops rising?

This is where it gets uncomfortable. The discussion tracks the pogre for over nine years, and during that time, a participant notes that the star portfolio had a poor result in 2022 and they don't know if the person in charge has abandoned the account.

Some compare the case to famous names in Spanish value investing, noting that managers considered geniuses for years have signed annual returns much lower than this portfolio. Others argue that a sustained 25% annual return simply doesn't exist: not in funds, not in ETFs, not among individuals—no one achieves it year after year. The usual response is that they do exist, but they don't work for a fund and don't report it publicly.

The discussion heats up when someone boasts of winning 43% in two weeks with 68,000 euros in currencies, or when another sets a personal challenge to beat the leader with a 25% annual average and presents their first four months: +4.9%, -1.9%, +1.33%, and +5.1%. Some respond that making money is hard and there are no shortcuts to experience.

With these elements, the initial question remains without a definitive answer. The portfolio multiplied the capital. There are also 2,999 others that did not. In five years, we will know if the person boasting of a method is still standing or has become the anecdote someone cites to explain survivorship bias. Chance, that manager, never signs its quarterly reports.