Impact of Reinvested Dividends: Stock Market Simulator

Dividend reinvestment is one of the most powerful mechanisms for accelerating portfolio growth. When dividends are reinvested, they buy new shares which, in turn, generate additional dividends. This is the snowball effect: each year, the capital base on which dividends are calculated increases.

Over short periods (5 years), the difference between reinvesting or not may seem modest. But over 20 or 30 years, the gap becomes spectacular. Historically, on the S'P 500, approximately 40% of the total return over 30 years comes from reinvested dividends. Ignoring this component means forgoing a major portion of the performance.

In a PEA, dividends are automatically reinvested without tax drag (no taxation as long as there is no withdrawal). This is why the PEA is the ideal wrapper for maximizing the effect of dividend reinvestment. In a CTO, dividends are taxed at 30% (flat tax) upon receipt, which reduces the amount available for reinvestment.

ETFs come in two variants: accumulating (dividends are automatically reinvested within the fund) and distributing (dividends are paid out to your account). To maximize the compound interest effect, accumulating ETFs are generally preferred, as reinvestment is automatic and free (no brokerage fees).

In a PEA, the choice between accumulating and distributing is mainly a matter of convenience: both benefit from the same tax treatment. However, in a CTO, accumulating ETFs have a tax advantage because reinvested dividends are not subject to the 30% flat tax at the time of reinvestment. Taxation is deferred until the sale of shares, allowing you to benefit from the compound effect on the gross dividend amount.

Among the most popular accumulating ETFs in a PEA are the Amundi MSCI World UCITS ETF (CW8) and the Amundi PEA S'P 500. These ETFs automatically reinvest dividends, thereby maximizing long-term capital growth.