Long-term investing in a diversified portfolio of stocks and bonds has produced positive returns for the average participant for as long as anyone has measured. Day trading — buying and selling securities within the same day to profit from short-term price movements — has produced losses for the average participant in every credible study ever done. These two facts coexist, and the distinction matters because the financial media and short-form social platforms blur them constantly.

Here’s what the actual research says.

The loss rate is real, and it’s been replicated everywhere

Several large-scale academic studies have tracked actual day-trader behavior across years and markets:

  • Brazil, 2020 (Chague, De-Losso, Giovannetti). Followed every individual who attempted day trading on Brazilian equity futures over a 7-year window. Of those who persisted for more than 300 trading days, 97% lost money. Only 1.1% earned more than the Brazilian minimum wage. Three traders made more than a starting bank-teller salary.
  • Taiwan, 1992–2006 (Barber, Lee, Liu, Odean). Covered the entire population of Taiwanese retail traders for 15 years. Fewer than 1% of day traders were able to beat the market net of costs in a way that would persist. The vast majority lost meaningful money.
  • United States, multiple eras. FINRA-cited data from the 2020 retail trading surge showed roughly 72% of pandemic-era retail day traders ended the year with net losses. The profitable 28% had a median profit of about $13,000 — meaningful, but not “quit your day job” money relative to the capital and hours required.
  • Brazilian pandemic update, through 2023. At peak, around 100,000 daily-active day traders. Aggregate gross losses by individuals reached R$9.9 billion. Average loss: about R$10,200 per individual. The pattern repeated.

The numbers are striking in their consistency. Different country, different decade, different platform, different regulatory regime — same outcome. The structural conclusion is not “most day traders are bad at it.” The structural conclusion is that day trading is a negative-expected-value activity for the average participant.

Why this is the case (it’s not random)

The 70–97% loss rate isn’t bad luck. Four forces stack against the retail day trader:

1. Transaction costs. Even with zero commissions, every trade incurs a bid-ask spread, a small market-impact cost, and a tax cost — short-term gains are taxed as ordinary income, not at the favorable long-term capital-gains rate. A trader who breaks even before costs loses real money after.

2. The other side of the trade. When a retail day trader buys at 10:32 AM, the seller on the other side is — most of the time — a sophisticated market maker, a quantitative hedge fund, or an institutional desk with information and execution advantages no retail trader can match. The retail trader is the marginal liquidity provider in a fight against professionals.

3. Behavioral leakage. The same studies that document losses also document predictable behavioral patterns: holding losing positions too long, selling winners too early, overtrading after a win, doubling down after a loss. These patterns produce a cumulative drag that compounds across many trades per day.

4. Persistence collapses. Of day traders who are profitable in a given year, only about 6–7% are profitable the next year. Over five years, that figure drops near 1%. Meaning even people who appear to have an edge in a single year usually don’t keep it. The set of consistently profitable retail day traders is genuinely small — well under 1% of attempts.

What long-term investing looks like instead

Now contrast with the actual data on the buy-and-hold investor in a diversified portfolio:

  • The U.S. equity market has produced roughly 9–10% nominal annualized returns over century-long windows. Investment-grade bonds have produced 4–5%. A blended portfolio sits between, with much lower volatility than equities alone.
  • A globally diversified portfolio of stocks and bonds, rebalanced periodically, has produced positive real returns over every rolling 20-year period in modern market history. Not most. Every.
  • The average dollar invested for 20+ years in a sensibly diversified portfolio has been profitable. Not 28% of dollars. The average dollar.

This isn’t the same comparison as “active vs. passive” or “picking individual stocks vs. an index fund.” It’s a more fundamental comparison: time horizon and capital compounding vs. high-frequency trading against professionals. The first earns the long-term reward for bearing market risk — the equity risk premium. The second tries to earn an information or execution edge in a marketplace dominated by people whose full-time job is having those edges.

This is also the same arithmetic behind why we don’t try to time the broad market. Day trading is essentially extreme market timing — same headwinds, amplified by frequency.

The “but what about” question

A common pushback: “But what about [famous trader / YouTuber / hedge fund manager who day-trades]?” Two things are true at once:

  1. A small number of individuals genuinely are profitable day traders. The Chague Brazil study found three out of more than 200,000 attempts who matched a normal banking salary.
  2. The visibility of those few is enormously magnified by survivorship bias. The 97% who lost don’t post their P&L screenshots. The 0.001% who won post relentlessly.

The base-rate question isn’t “can it be done?” — it can. The question is “what’s the probability that I will be one of them, before having spent years and substantial capital finding out?” The answer from the data is: very low.

What this means in practice

A few practical takeaways:

  • If you’re considering day trading as a primary strategy or income source, the evidence is overwhelmingly against it for the average participant. This is not a moral judgment; it’s an arithmetic one. The expected value is negative after costs.
  • If you want to actively engage with markets as a hobby or learning experience, treat it as such — with a strictly capped amount of money you can afford to lose entirely, separate from your retirement and emergency savings. The educational value of watching markets can be real; don’t conflate it with a path to wealth.
  • The core of your wealth should be invested for the long term in a diversified portfolio. This is the part where the math works in your favor — quietly, slowly, compounding, with real positive expected returns. It’s also the part the financial media talks about least, because patience doesn’t sell ad impressions.

The choice between day trading and long-term investing isn’t really a choice between two strategies. It’s a choice between two arithmetic regimes — one where the average participant loses money, and one where the average participant makes money. The historical data is unambiguous about which is which.

General educational information about retail day trading and long-term investing. Not personalized investment advice. Specific investment decisions should be made in light of your own circumstances, goals, and risk tolerance. Past performance does not guarantee future results.