Trading vs Investing: What New Zealand Investors Need to Know

Trading and Investing Are Not the Same Thing

People often use “trading” and “investing” as though they mean the same thing. They do not. For most New Zealand investors, long-term investing is far more likely to build sustainable wealth, and the reasons are structural, not personal. The distinction between these two approaches shapes your returns, your tax obligations, and your odds of a good outcome over decades.

Trading means buying and selling assets over short timeframes, from minutes to months, with the aim of profiting from price movements. Investing means acquiring assets and holding them for years or decades, allowing compounding, dividends, and long-term market growth to do the heavy lifting.

Both involve putting capital at risk. The similarities largely end there.

Do Most Traders Lose Money?

It is worth acknowledging upfront why trading appeals to so many people. The idea of taking active control of your finances, spotting an opportunity others have missed, and generating quick returns is genuinely compelling. The rise of low-cost platforms in New Zealand has made it easier than ever to start. Yet the outcomes tell a very different story.

The research on trader results is extensive, and the findings are consistent across markets, time periods, and geographies.

A widely cited study by Barber, Lee, Liu, and Odean, published in 2010 and based on the complete trading records of Taiwanese day traders, found 80% quit within their first two years. After five years, only 7% remained active. Among those still trading, the vast majority were unprofitable after costs.

On any given day, 97% of day traders lost money net of fees. The average individual investor underperformed the broader market by roughly 1.5% per year. And the most active traders, those executing the highest volume of transactions, tended to produce the worst results.

Regulatory data confirms the pattern. A US state securities regulator investigation concluded 70% of sampled day trading accounts lost money, and only 11.5% showed any evidence of profitable trading. European broker disclosures, now mandated by regulation, consistently show between 65% and 80% of retail CFD accounts losing money. Closer to home, New Zealand’s Financial Markets Authority (FMA) has repeatedly cautioned retail investors about the risks of speculative trading and complex derivative products.

Profitable trading is possible, but the base rate for success is very low. For an everyday investor, the odds are stacked against skill alone overcoming costs, tax, and behavioural impulses. A simple, diversified, long-term portfolio would have served the vast majority of traders better.

Why Long-Term Investing Outperforms Trading

Several structural forces work in favour of investors and against traders.

• ‍Compounding works over time. The longer money stays invested, the more powerful compounding becomes. A dollar invested at 7% annual growth doubles roughly every ten years. Frequent trading interrupts this process. Every time a trader exits a position, the compounding clock resets.‍
• Diversification smooths the ride. A well-diversified portfolio, spread across hundreds or thousands of companies through managed funds or exchange-traded funds (ETFs), captures the broad return of markets while diluting the impact of any single company failing. Traders, by contrast, typically concentrate in a handful of positions, which amplifies both gains and losses. This is the same diversification principle at the heart of a well-constructed investment management approach.‍
• Costs compound too, but in the wrong direction. Every transaction carries a cost: brokerage fees, bid-ask spreads, and foreign exchange margins if trading offshore. A long-term investor buying a diversified fund might transact once or twice a year. A frequent trader might transact dozens of times a month. Over years, the cumulative drag of those costs is substantial, regardless of whether the underlying trades were profitable.‍
• Behaviour is the hidden variable. Most investors understand, in theory, they should buy low and sell high. In practice, fear and overconfidence drive the opposite behaviour. This shows up most often when people sell during a market dip to stop the discomfort of watching their balance fall, then wait too long to re-enter after prices have already recovered. Researchers call this the disposition effect: the tendency to sell winners too early and hold losers too long. Traders are more exposed to these impulses because they face far more decision points every week.

The NZ Tax Angle

New Zealand does not have a general capital gains tax. For buy-and-hold investors, this is a significant structural advantage.

If you purchase shares in a New Zealand company and hold them for years, selling at a profit, you will typically owe no tax on the gain. The profit is yours to keep.

Traders face a different reality. Under the Income Tax Act 2007, gains from selling shares may be taxable if:

The IRD applies what is commonly called an “intention test.” If you bought shares primarily to flip them rather than to hold and earn dividends, any profit is treated as taxable income at your marginal tax rate. Factors the IRD considers include the frequency and scale of your transactions, whether you borrowed money to fund them, and the types of shares you selected.

This assessment is holistic and often retrospective. Many traders only discover their tax exposure after the fact, sometimes years later, when the IRD reviews their trading patterns. The lack of a bright-line rule for shares, unlike property, makes this an area where many people get caught out.

In contrast, for buy-and-hold investors with foreign shares valued above NZ$50,000, the Foreign Investment Fund (FIF) rules apply. Under the most common method, the fair dividend rate, you pay tax on a deemed income of 5% of your opening portfolio value each year, whether or not you have sold anything. This regime is separate from the trading versus investing distinction, but it is worth understanding as part of the broader picture.

Tax is complex and the above is general information only. Before making investment decisions, seek professional advice from a qualified tax adviser or accountant.

The Real Cost of Trading

Beyond tax, trading carries costs rarely captured in a profit-and-loss screenshot shared on social media.

• ‍Transaction fees. Every buy and sell order incurs brokerage. On a typical New Zealand online platform, a round-trip trade might cost NZ$10 to $30 in brokerage alone. Trade ten times a month and the annual bill runs to $1,200 to $3,600 before considering spreads or FX costs.‍
• Spreads and slippage. The bid-ask spread on each trade is a cost borne entirely by the trader. In thinly traded NZX stocks, this spread can be material. Slippage, where the execution price differs from the expected price, adds further drag in volatile conditions.‍
• Foreign exchange margins. Most New Zealand trading platforms charge 0.4% to 0.7% on currency conversions when trading US or Australian shares. For active traders converting frequently, these margins accumulate rapidly.‍
• Time. Successful trading demands hours of daily research, monitoring, and execution. For most people, the opportunity cost of this time, which could be spent earning income, building a business, or simply living, is the largest hidden cost of all.

When Active Trading Might Have a Place

The evidence strongly suggests long-term investing is the better path for most people. But it would be incomplete without acknowledging some nuance.

Some individuals, typically those with professional-level market knowledge, strong emotional discipline, and capital they can genuinely afford to lose, can trade profitably over time. They represent a small minority, but they exist.

A common and sensible approach for someone drawn to trading is to allocate a small, defined portion of their overall wealth, sometimes called a “satellite” allocation, to active trading while keeping the bulk of their portfolio in a diversified, long-term core. This way the trading itch gets scratched without jeopardising retirement savings or long-term financial goals.

The critical point is proportion. If trading money represents 5% or 10% of total investable assets and the remaining 90% to 95% sits in a well-constructed, professionally managed portfolio, a poor run of trades is a setback rather than a crisis.

How Become Wealth Thinks About This

We see the trading-versus-investing question regularly among new clients. The pattern is consistent: people who have tried active trading for a period arrive wanting to take a more structured, evidence-based approach to growing their wealth.

“The clients who come to us after a stretch of active trading usually have two things in common,” says Joseph Darby, CEO of Become Wealth. “They have spent more time on it than they expected, and their results have been underwhelming relative to what a simple diversified portfolio would have delivered. Once people see the data, moving to professional investment management feels like a better-informed decision.”

Building a Sound Investment Approach

For most New Zealanders, the evidence points clearly toward long-term, diversified investing. The practical building blocks are well established:

None of this is glamorous. It rarely makes for exciting conversation. But the long-term data, across every major market over every meaningful time period, shows it works.

Where to From Here

If you are currently trading, or considering it, the research is worth sitting with.

If you are ready to explore a long-term, evidence-based approach to building wealth, Become Wealth can help. We are a dual-licensed advisory and investment management firm, not owned by a bank or product provider, and our recommendations are based on independent third-party research. We manage over $1 billion in funds under advice for New Zealand families.

To book a complimentary initial consultation, get in touch.