Investing in the stock market involves buying shares of companies listed on a regulated market, with the aim of growing capital over the long term. The return comes from two sources: the change in the stock price and the dividends paid by certain companies. Before investing any euros, understanding the concrete workings of investment vehicles and tax wrappers helps avoid costly mistakes in the early months.
Fractional ETFs and systematic investment: what changes for starting in the stock market
Traditional guides describe buying individual stocks as the entry point to the markets. The reality of 2025-2026 is different. In France, more than 1.1 million individuals made at least one transaction on an ETF in 2025, an increase of 83% compared to 2024, with the number of transactions more than doubling in a year.
An ETF (Exchange Traded Fund) is a continuously traded fund that replicates a stock index. Buying a share of a global ETF means indirectly owning hundreds of companies in a single line. The entry ticket has lowered: some apps allow for automatic investment starting from one euro by purchasing fractional ETFs.
This mechanism transforms stock market investment into a regular action, akin to a monthly automatic transfer. For beginners, this means there is no longer a need to have several hundred euros or to choose stocks one by one to discover the stock market on KF Finances and start building a diversified portfolio.
Tax wrappers: PEA, securities account, and life insurance compared
The choice of tax wrapper determines the taxation applied to gains, the accessible securities, and the withdrawal conditions. Three main wrappers coexist in France.
- PEA (Plan d’Épargne en Actions): capped at 150,000 euros of contributions, it offers an exemption from capital gains tax after five years of holding (excluding social contributions). It is limited to European stocks and certain eligible ETFs.
- Ordinary securities account: no cap, no geographical restrictions on securities, but gains are subject to a flat tax rate of 30%. It is suitable for investors who want access to American or Asian markets without going through an eligible PEA ETF.
- Unit-linked life insurance: it allows investment in equity funds, ETFs, and sometimes SCPI, with reduced taxation after eight years. Management is often delegated, which suits those who do not wish to place orders themselves.
For a first investment in the stock market, the PEA remains the most tax-advantageous wrapper if the investment horizon exceeds five years. Opening a PEA early, even with a symbolic contribution, establishes tax precedence.
Risk management: building a portfolio that withstands downturns
Diversification is the only free lever for reducing risk. Holding a single security exposes one to the bankruptcy of a company. Spreading capital across multiple sectors, geographical areas, and asset classes (stocks, bonds) limits the impact of an isolated drop.
A global ETF mechanically diversifies across hundreds of companies. Adding a bond or euro fund pocket in a life insurance policy stabilizes the overall portfolio. The stock/bond ratio depends on the investment horizon: the longer the term, the higher the equity portion can be.
The trap of market timing
Trying to buy at the low point and sell at the high point is a losing strategy for most individual investors. Long-term performance studies show that staying invested in the markets yields better results than attempting to predict short-term movements.
Systematic investment (regular purchase of a fixed amount each month) smooths the average purchase price. In a downturn, the same amount buys more shares. In an upturn, it buys fewer. This mechanism, called dollar-cost averaging, eliminates the question of the right time to enter the market.
Brokerage fees and management fees: the impact on long-term returns
Fees are the only performance factor that the investor can control in advance. Two categories deserve particular attention.
Brokerage fees apply to each buy or sell order. They vary greatly from one intermediary to another: some online brokers charge less than one euro per transaction on ETFs, while traditional banks may charge several euros per order. On a monthly systematic investment, the difference accumulates quickly.
Annual management fees of a fund or ETF reduce net performance each year. An index ETF has very low management fees, often below 0.30% per year. An actively managed fund charges on average several times that amount. Over twenty years, this fee gap represents a significant portion of the final capital.
Check the fees before subscribing
Before opening a PEA or a securities account, compare the fee schedules of brokers on three criteria: cost per order, any custody fees, and transfer fees in case of changing intermediaries. An online broker with no custody fees and low-cost orders remains the most coherent choice for regular ETF investment.
The gross return of a stock market investment says nothing until the fees have been deducted. A low-cost ETF portfolio, housed in a PEA opened with a competitive broker, increases the share of returns actually retained by the investor over the long term.
