Emotional reactions to market movements cost New Zealand investors more than most realise. Buying after prices have already risen and selling when they fall eats into long-term returns far more than picking the wrong fund ever could. The research shows that staying invested through market cycles consistently beats moving to cash, yet many investors do the opposite at exactly the wrong time.
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This article is general information only and does not constitute professional advice. For your specific situation, consult a qualified professional.
These patterns aren’t random. Newer investors and those expecting predictable returns are most vulnerable to emotional gaps. The same research found that a considered, informed plan and basic financial knowledge help manage both expectations and reactions. If you’re not sure where your own blind spots are, it’s worth working through the basics of investing in New Zealand before making any big moves.
Here’s what you actually need to know.
What I tend to notice is that most people know they shouldn’t react emotionally, yet they still do. That gap between knowledge and behaviour is what the research calls the emotional gap — and it’s the main reason a plan matters more than a prediction.
One of the most practical things you can do is get a clearer picture of how your own instincts work. Risk management strategies for Kiwi investors can help you identify the patterns that trip you up before they cost you.
What the 4.52% advice premium actually means for your money
That 4.52 percent figure from the research isn’t a guarantee. It’s the estimated value that professional financial advice adds to a New Zealand investor’s portfolio, largely through behavioural coaching, appropriate asset allocation, and long-term planning support. In cash terms, on a $200,000 portfolio, that’s roughly $9,040 of additional value over time — not from picking hot stocks, but from helping you avoid costly emotional moves.
The table below shows how common emotional reactions compare with a more disciplined approach, based on the patterns found in the research.
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| Investor Behaviour | What Happens Next | Smarter Approach |
|---|---|---|
| Panic selling when markets drop | You lock in losses and miss the rebound | Stay invested through the cycle |
| Buying after prices have risen sharply | You pay more than the asset is worth | Follow a consistent plan, not the hype |
| Constant trading during volatile periods | Fees and poor timing eat your returns | Reduce how often you trade |
Volatility is the price you pay for higher long-term returns. The research is clear that waiting, rather than frequent trading, is what rewards long-term investors. If you need help thinking through how your own portfolio is positioned, asking a financial professional can give you a clearer picture without the emotional noise.
Four specific mistakes that show up in the research
Chasing performance after a run-up
When a market or a stock has already risen, it feels safe to buy. The research calls this “buying after prices rise” — and it’s one of the most common emotional mistakes. The problem is straightforward: you’re paying more than you would have a month ago, and the easy gains have already happened. The fix is to follow a consistent investment schedule rather than reacting to recent performance.
Panic selling during a downturn
Markets rebound after downturns, but you only benefit from the recovery if you’re still invested. Selling after prices fall locks in the loss and guarantees you miss the bounce. The research notes that this is especially damaging for newer investors who haven’t experienced a full market cycle. What tends to work better is reminding yourself that downturns are part of the deal, not a reason to exit.
Following the herd instead of your own plan
Herd behaviour and fear of missing out lead investors to mimic what others are doing rather than making independent decisions. The research flags this as a pattern that shows up most when a particular asset class or sector is getting attention. The problem is that by the time everyone is talking about it, the pricing often reflects that enthusiasm. Sticking with your own allocation — not someone else’s — is the more reliable path.
Letting loss aversion take over in retirement
Loss aversion is strongest when you’re relying on your savings for income. The research notes that retirees feel losses more intensely than gains, which can lead to an overly cautious approach that actually hurts long-term returns. If you shift too much to cash out of fear, you risk inflation eating away at your purchasing power. The smarter move is to maintain an appropriate allocation for your time horizon, not just your emotional comfort.
What I’d say is that the most costly of these is panic selling, because it has a double effect — you lose money on the way down and you miss the recovery on the way up. If you’re worried you might be tempted, it’s worth understanding fixed-income options that can provide stability without forcing you to sell at the worst time.
How to build a plan that keeps your emotions in check
Start with a written plan that covers your behaviour, not just your returns
A considered, informed plan is what the research says helps manage emotions and expectations. That plan should include what you’ll do when markets drop, not just what you hope will happen. Write down your asset allocation, your time horizon, and your commitment to staying invested through cycles. The act of writing it makes it harder to abandon in the heat of the moment.
Work with an adviser for the behavioural coaching
The 4.52 percent value add from professional advice comes mostly from behavioural coaching — someone who can talk you out of panic selling or FOMO buying. An adviser also helps with appropriate asset allocation and long-term planning. If you don’t have one, it’s worth considering how a second opinion could change your decisions. You can also get a second opinion on your investment strategy without committing to a full advisory relationship.
Diversify across markets and asset types
Diversification doesn’t prevent losses, but it spreads risk so that no single downturn derails your entire plan. The research is clear that holding a mix of markets and asset types helps manage risk and makes it easier to stay invested. If your portfolio is concentrated in one market or one sector, that’s a risk worth addressing before the next downturn tests your discipline.
Build your financial knowledge to reduce anxiety
Education and understanding how markets operate reduce surprise and anxiety about events. The research notes that newer investors are more vulnerable to emotional gaps partly because they don’t have a framework for interpreting market movements. Taking time to learn the basics — how compounding works, what volatility means, how diversification helps — gives you a foundation that emotions can’t easily shake.
Frequently asked questions about NZ investing mistakes
What is the single biggest mistake NZ investors make? ▾
How much value does a financial adviser actually add? ▾
Is it better to stay invested or move to cash during a downturn? ▾
How does loss aversion affect retirement investing? ▾
Can diversification really protect against emotional mistakes? ▾
What should I do if I’ve already made some of these mistakes? ▾
The real cost of investing without a plan
The research makes one thing clear: the biggest risk to your returns isn’t picking the wrong asset — it’s your own reaction to the market. The 4.52 percent value that professional advice adds is essentially a measure of what you save by not making emotional mistakes. That’s a cost you can avoid simply by having a plan you’ll actually stick with, and by understanding the patterns that trip investors up. Whether you go it alone with a written strategy or work with an adviser, the discipline to stay the course is what separates investors who grow their wealth from those who don’t.
Remember: this article is general information only. For advice on your specific situation, speak to a qualified professional.
If this was useful, you might also want to read Stop Losing Money: Essential Risk Management for Kiwi Investors.
Sources and Further Reading
Investing for Beginners: Your Step-by-Step Guide to a Brighter Future — A practical starting point for anyone new to investing in New Zealand.
Understanding Fixed-Income Options for New Zealand Investors — How bonds and term deposits can add stability to a portfolio without triggering emotional selling.
BusinessDesk (2024). Avoiding mistakes many investors make. 🔗
