INVESTING

Even the most disciplined investors can fall prey to common investing mistakes that quietly erode wealth over time. For Canadian retail investors, errors such as high fees, tax inefficiencies, and poor diversification can significantly reduce long-term returns. Hidden costs, including management expense ratios (MERs), trading commissions, and bid-ask spreads, compound over years, while misusing Tax-Free Savings Accounts (TFSAs), Registered Retirement Savings Plans (RRSPs), or taxable accounts may increase your tax burden.

Many Canadians also exhibit home-country bias, concentrating heavily in domestic equities or a narrow set of asset classes, leaving portfolios exposed to market volatility and economic uncertainties. These decisions often result in lower compounded growth, heightened portfolio risk, and heightened emotional stress, leading to rash or reactive decisions such as panic selling during market downturns.

This guide explores 12 critical investing mistakes, illustrated with mini case studies and practical examples to highlight real-world impact. Each section includes actionable guidance to reduce lost returns, avoid unnecessary risk, and improve decision-making. A glossary of key terms is provided to clarify technical concepts, helping you make informed, disciplined investment choices. By recognizing and correcting these pitfalls, Canadians can build diversified portfolios, stay invested through market fluctuations, and improve the likelihood of achieving their long-term financial goals.

TL;DR: The Key Considerations

• High fees: MERs and trading costs can reduce long-term returns; switch to low-cost funds or ETFs.
• Poor diversification: Home bias increases risk; diversify across asset classes and geographies.
• Panic selling: Reacting to market downturns can lock in losses; maintain a long-term plan.
• Chasing performance: Buying past winners often underperforms; stick to a disciplined allocation.
• Tax inefficiencies: Mismanaged TFSA/RRSP contributions reduce tax-advantaged growth; review account types and withdrawals.

Next steps: Review your investment portfolio against these mistakes, implement quick fixes, and commit to consistent, disciplined investing for better long-term outcomes.

The 9 Investing Mistakes Canadians Still Make

Even experienced Canadians fall into recurring investing mistakes that erode returns and increase risk. From high fees and poor diversification to emotional decision-making, these errors can have long-term consequences. Below, we break down the 10 most common mistakes and how to fix them.

1. Timing the Market vs. Staying Invested

What it looks like:

Many investors try to time the market by buying or selling based on news headlines, quarterly earnings, or economic forecasts. Seasonal behaviours, like exiting equity markets before year-end or jumping in during a rally, are common examples of reactive trading.

Why it hurts:

Attempting to predict market peaks and troughs often backfires. Missing even a few of the market’s best-performing days can significantly reduce long-term investment returns. Emotional decision-making during periods of market volatility leads to panic selling at the bottom and buying high during rallies, locking in losses and undermining a long-term plan. Research consistently shows that even professional investors struggle to outperform a disciplined buy-and-hold strategy over time.

Considerations:

A common practice is to maintain a long-term investment plan aligned with one’s financial goals and risk profile. Employing dollar-cost averaging can facilitate consistent contributions, potentially minimizing the effect of short-term market fluctuations. Automating contributions to mutual funds, exchange-traded funds (ETFs), or other investments may help to ensure regularity. Sustained investment allows the portfolio to benefit from compounding and navigate market fluctuations, which may support the potential for positive long-term returns.

2. Paying High Mutual Fund Fees (MERs) Without Value

Symptoms:

A common investing mistake is holding portfolios dominated by high-MER mutual funds. Many investors assume high fees guarantee superior returns, but research shows little correlation between fees and long-term performance.

Impact:

High management fees act as a compound drag, reducing the growth of your investment portfolio over decades. A higher MER can significantly erode long-term gains, especially when compounded annually. Funds with excessive fees also limit your ability to reinvest dividends or capital gains, diminishing the power of compounding. Over time, investors may end up with lower cumulative returns despite similar or inferior risk exposure compared to low-cost alternatives.

Considerations:

A common practice is to evaluate one’s portfolio periodically to identify funds with higher costs relative to their potential value contribution. One may consider transitioning to lower-cost ETFs or index funds that offer comparable market exposure with reduced fees. Comparing fund performance against relevant benchmarks can help assess value, beyond simply historical returns. Monitoring MERs and transaction costs regularly can help ensure the portfolio remains aligned with a long-term plan, potentially reducing unnecessary expenses, and supporting investment returns over time.

3. Home Bias & Poor Diversification

Symptoms:

Canadian investors can exhibit home bias, concentrating heavily in domestic equities or a few familiar sectors. Portfolios often have minimal international exposure, leaving investors vulnerable to country-specific risks and market shocks.

Impact:

Lack of diversification increases concentration risk, meaning poor performance in one sector or region can disproportionately affect your overall portfolio. During market downturns, this strategy often leads to higher volatility and emotional stress, prompting rash decisions like panic selling. Over the long term, under-diversified portfolios typically underperform globally diversified portfolios, missing opportunities in emerging markets, foreign equities, and alternative asset classes.

Considerations:

A common practice is to build a diversified portfolio by distributing investments across multiple regions, sectors, and asset classes. One may consider international ETFs, sector-specific funds, and bonds to potentially reduce correlation and manage volatility. Rebalance your portfolio periodically to maintain the intended target allocation and risk profile. By spreading exposure, one may aim to mitigate the impact of localized economic fluctuations, support long-term stability, and potentially enhance the consistency of investment returns, including during periods of market volatility.

4. Misusing Registered Accounts (TFSA/RRSP/RESP)

Common errors:

Canadian investors can make mistakes with registered accounts, including over-contributing to TFSAs or RRSPs, withdrawing funds incorrectly, or holding the wrong assets in the wrong account type. For example, placing high-growth or interest-generating investments in a taxable account instead of a tax-advantaged TFSA or RRSP reduces efficiency. Registered Education Savings Plan (RESP) accounts may also be underutilized or mismanaged, limiting potential grants for children’s education.

Cost:

These missteps can trigger penalties, such as over-contribution charges, and reduce tax-deferred or tax-free growth, which compounds over time. Poor account utilization limits the impact of long-term compounding and may increase your taxable income, resulting in higher annual taxes and lower net investment returns.

Considerations:

Aligning asset location with the tax characteristics of each account is a common strategy. One may consider placing high-growth or tax-inefficient investments, such as bonds or dividend-paying equities, in RRSPs, and hold stocks or ETFs in a TFSA for tax-free compounding. Tracking the contribution room carefully using CRA tools can avoid penalties. For RESPs, maximizing contributions is often done to secure available government grants for educational savings. Thoughtful allocation across accounts could increase long-term returns and help achieve financial goals efficiently.

5. Chasing Performance & FOMO

Behaviours:

A common investing mistake is chasing short-term market winners. Investors frequently jump into “hot” ETFs, stocks, or sectors after media hype or because peers are buying. Social pressure and fear of missing out (FOMO) often drive impulsive decisions that ignore long-term strategy.

Risk:

This approach can lead to buying at peak prices and selling during downturns, effectively locking in losses. Portfolios become more exposed to market volatility, and emotional decision-making can derail a carefully designed diversified portfolio. Even professional investors struggle to consistently time markets, highlighting the danger of reactive investing. Over time, chasing performance often results in lower long-term investment returns compared with disciplined, strategic investing.

Considerations:

Adhering to a predefined investment policy statement (IPS) or a long-term financial plan is a common practice. Systematic contribution methods, such as automatic monthly investments, can be used to mitigate the impact of market fluctuations through dollar-cost averaging. Reviewing decisions on a quarterly or annual basis, rather than reacting to headlines or short-term performance, can help prevent impulsive trades. Maintaining a focus on financial goals, risk tolerance, and asset allocation reduces emotional trading and increases the likelihood of remaining invested for long-term returns.

6. Ignoring Taxes in Taxable Accounts

Triggers:

Investors often overlook the tax implications of trading in taxable accounts. Frequent buying and selling, automatic dividend reinvestment, and realizing capital gains without planning can all create unexpected tax liabilities, eroding the benefits of investment growth.

Cost:

Ignoring taxes can significantly reduce net investment returns. Capital gains and dividends are taxable in the year they’re realized, increasing your income tax bill. Over time, these costs compound, and even a small annual tax drag can result in substantial lost growth. Investors may find that their portfolio underperforms compared to similar tax-advantaged alternatives, like TFSAs or RRSPs, despite similar market performance.

Considerations:

Strategic asset location is a key consideration in portfolio management. Tax-efficient investments, such as interest-bearing bonds or certain dividend-paying stocks, are often held within registered accounts like RRSPs or TFSAs. Additionally, tax-loss harvesting can be used strategically to offset realized gains and manage the annual tax burden. For long-term growth investments, utilizing a TFSA allows for tax-free compounding. Regular reviews of portfolio tax efficiency can help retain a higher portion of investment returns and maintain alignment with long-term financial objectives.

7. Holding Too Much Cash for Too Long

When it happens:

Investors often accumulate excess cash during periods of market fear, economic uncertainty, or volatility. While holding cash may feel safe, leaving large amounts uninvested for extended periods can undermine long-term growth.

Opportunity cost:

Excess cash represents lost potential market gains. Historically, markets recover and grow over time, and missing just a few strong market days can dramatically reduce long-term returns. Cash held outside of a disciplined plan does not benefit from compound growth, dividend reinvestment, or capital appreciation, ultimately reducing the performance of your investment portfolio and delaying achievement of financial goals.

Considerations:

Setting target cash allocations as part of your asset allocation, reflecting risk profile and liquidity needs, is a common strategy. From there, one can consider gradually deploying available cash into equities, bonds, or diversified funds using dollar-cost averaging, potentially reducing the risk associated with timing market entry. Alignment of cash holdings with the long-term plan, rather than short-term sentiment, is a common practice. By maintaining an intentional cash allocation, investors can preserve liquidity for opportunities while remaining invested for long-term growth and potentially supporting overall investment returns.

8. Emotional Trading & Behavioural Biases

Biases:

Investors are often influenced by behavioural biases that lead to suboptimal decisions. Common examples include loss aversion (fear of realizing losses), the recency effect (overweighting recent market events), and overconfidence (overestimating knowledge or timing ability). Even experienced investors can fall prey to these tendencies, reacting impulsively to short-term market news or peer behaviour.

Impact:

Emotional trading can result in reduced long-term returns and heightened portfolio risk. Selling during market downturns or chasing hot assets can lead to buying high and selling low, eroding compounding benefits. Bias-driven decisions may also skew asset allocation, leaving portfolios exposed to unnecessary volatility and misaligned with long-term financial goals.

Considerations:

Establishing a predefined Investment Policy Statement (IPS) helps set objective goals, risk tolerance, and rebalancing rules to counteract emotional biases. Systematic investing techniques, such as automatic contributions or dollar-cost averaging, can be implemented to maintain discipline. Professional advice may also provide an external perspective to support consistent decision-making. These strategies can help investors remain focused on long-term objectives and improve outcomes despite market fluctuations and economic uncertainties.

9. Concentrated Single-Stock/Employer Stock Bets

Red flags:

A common investing mistake is holding a heavy allocation to a single stock, often an employer’s shares or a company you are personally connected with. While confidence in familiar companies is natural, overexposure can be dangerous.

Risk:

Concentration increases portfolio volatility and exposes investors to company-specific risks, such as earnings misses, regulatory changes, or management issues. Even strong companies can experience sudden declines, which can significantly erode investment returns. Relying too heavily on one asset also undermines the benefits of a diversified portfolio, leaving your long-term plan vulnerable during market downturns.

Considerations:

One way to mitigate this risk is by diversifying investments across multiple sectors, ETFs, and fixed-income assets. Single-stock exposure can be reduced through partial sales or rebalancing strategies. For large concentrated positions, hedging or protective strategies may be considered after an assessment of the associated costs and risks. Maintaining a diversified portfolio aligns with risk tolerance, can help stabilize long-term returns, and reduces dependence on the performance of a single company. A balanced approach allows investors to capture market growth while providing a measure of protection against unexpected events.

Mini Case Studies

Case A: Switching a 2.11% MER Fund to a 0.37% ETF*

Over 20 years, a $50,000 initial investment with 6% annual returns in a 2.11% MER mutual fund grows to roughly $241,577, compared with $358,000 in a 0.37% ETF. The compounding effect of lower fees saves over $117,271 highlighting the long-term cost of high MERs.

Case B: TFSA Optimization to Avoid Over-Contribution Penalties

A Canadian investor accidentally exceeds TFSA contribution room by $5,000, triggering monthly penalties and lost growth. By tracking contributions through CRA My Account and adjusting deposits, the investor avoids over-contributions, maximizes tax-free compounding, and improves long-term portfolio growth while maintaining compliance with contribution limits.

Mini Glossary

• MER (Management Expense Ratio): The annual fee charged by a fund for managing investments. High MERs can erode long-term returns.
• ETF (Exchange-Traded Fund): A low-cost, diversified fund traded like a stock, often used as a cost-efficient alternative to mutual funds.
• Asset Allocation: The process of distributing investments across asset classes (stocks, bonds, cash) to manage risk and optimize returns.
• Rebalancing: Periodically adjusting your portfolio to maintain target allocations, helping manage risk and discipline.
• Withholding Tax: Tax deducted at source on foreign investment income, which can reduce net returns and affect tax planning strategies.

Staying on Track: Actionable Steps to Avoid Investing Mistakes

Avoiding common investing mistakes requires discipline, planning, and awareness. Diversifying across asset classes, controlling fees and MERs, and staying invested through market fluctuations. Regularly review portfolios, track contributions, and rebalance to stay aligned with long-term goals.