The market opens sharply lower. Your phone flashes red. A portfolio that took years to build is suddenly down thousands of dollars.

The numbers feel personal because they are personal. A $100,000 portfolio that falls 18% is now worth $82,000. Recovering that $18,000 requires a 22% gain—not merely an 18% gain—because the recovery begins from a smaller base.

Then come the conflicting instructions: sell before it gets worse, buy the dip, move to cash, or stop looking.

The right answer is rarely found in a headline. It depends on why you invested, when you need the money, how diversified you are and whether the investment—or only its price—has changed.

Quick Answer

When the stock market falls, pause before trading. Confirm that near-term expenses and emergency savings are protected, then review your time horizon, diversification and target asset allocation. Continue planned contributions only if they remain affordable. Rebalance according to a written rule, and investigate individual holdings before buying or selling them.

A falling market is not automatically a reason to sell. It is also not automatically a bargain.

What a Market Crash Looks Like in Real Dollars

The COVID-19 sell-off shows how quickly market values can change—and why the first emotional response can be misleading.

According to the Bank of Canada, the S&P/TSX Composite fell 37% between February 19 and March 23, 2020. About $1 trillion in the value of Canadian-listed companies disappeared during that period. By the end of August, however, the index had recovered most of the decline and was less than 10% below its February level.

The U.S. market followed a similar path. S&P Dow Jones Indices reports that the S&P 500 fell 33.8% from February 19 to March 23, regained its previous high by August and ended 2020 with an 18.4% gain.

These figures do not prove that every decline will recover quickly. The next downturn may last much longer. They demonstrate something narrower but important: a frightening loss on one date does not tell you what the full-year result—or the eventual recovery—will be.

Alex’s $100,000 Decision

Alex has invested in a TFSA for six years. At the recent peak, the account was worth $100,000:

  • $55,000 in a broad-market ETF
  • $15,000 in a Canadian dividend ETF
  • $30,000 in individual technology stocks

After a difficult month, the portfolio is down 18% to approximately $82,000. The technology holdings have fallen the most. At 11:47 p.m., Alex opens the brokerage app and reaches the sell screen.

Before pressing the button, Alex asks: Has my plan failed, or has the market simply fallen?

The mortgage payment is covered. The emergency fund holds six months of essential expenses. The TFSA money is intended for retirement more than 20 years away. The goal has not changed.

But the review reveals a real problem: technology represented 30% of the portfolio before the decline, far more than Alex intended. The downturn did not create that concentration. It exposed it.

Here are the seven steps Alex—and any investor—can use to decide what comes next.

1. Put 24 Hours Between Fear and a Trade

Selling can stop the discomfort of watching prices fall, but it creates a second difficult decision: when to return.

Waiting until the market feels safe often means waiting until prices have already risen. In Vanguard modelling of a diversified 60/40 portfolio around the 2020 downturn, the portfolio that maintained its allocation produced a 46% cumulative return over the study period. A hypothetical investor who moved to cash at the March 2020 bottom and returned after the market recovered produced 20%. The calculation is an illustration based on historical index data—not a forecast—but it shows how one mistimed exit can affect years of results.

Alex does not assume that holding is always correct. Instead, Alex writes down:

  • Why each investment was purchased
  • When the money will be needed
  • What has materially changed
  • Whether the decline is market-wide or company-specific
  • What evidence would justify selling

The 24-hour pause is not a market prediction. It is a circuit breaker for emotion.

2. Protect Money You Will Need Soon

A 25-year-old investing for retirement and a 62-year-old planning withdrawals next year should not hold the same amount of stock-market risk simply because they own similar ETFs.

Stocks can remain below a previous high for years. Money for next year’s tuition, a house down payment or essential retirement spending may therefore belong in cash, guaranteed investment certificates or other lower-volatility holdings, depending on the goal.

Ask one hard question:

If this portfolio stayed below its previous high for five years, could I still pay for everything this money is meant to fund?

Alex can answer yes because the TFSA is for retirement and the emergency fund is separate. If the answer were no, the problem would be the portfolio’s design—not merely today’s decline.

3. Measure Diversification Instead of Counting Tickers

Owning several funds does not guarantee diversification. An S&P 500 ETF, a Nasdaq ETF, a technology-sector fund and shares of several large technology companies can contain many of the same businesses.

Vanguard examined more than 44,000 self-directed investors who later adopted its advice service. Nearly 90% improved their portfolio construction after receiving advice. Beforehand, 65% had no international allocation, while 30% held more than 10% of their portfolios in cash. The study is specific to Vanguard clients, but it illustrates how common concentration and allocation problems can be.

Alex checks the underlying holdings—not just the fund names—and reviews exposure across companies, sectors, countries, currencies and asset classes. That makes the 30% technology weight visible.

Diversification cannot prevent losses. Its purpose is to reduce the damage one company, sector or market can do to the entire plan.

Canadian investors comparing broad-market and U.S.-focused funds can review TwikUp’s XEQT vs. VEQT vs. VFV vs. VOO comparison. The useful question is not which ticker recently won; it is what each holding contributes to the complete portfolio.

4. Keep Contributing—Only If the Cash Flow Works

Regular contributions buy more units when prices are lower. If Alex invests $500 each month:

  • At $50 per unit, $500 buys 10 units.
  • At $40, it buys 12.5 units.
  • At $25, it buys 20 units.

This is dollar-cost averaging. It reduces the need to identify the exact bottom, but it does not guarantee a profit or protect against further losses.

The order of priorities matters. Alex continues contributing only after paying essential bills, maintaining the emergency fund and managing high-interest debt. Buying more stock with money needed for next month’s rent is not disciplined investing; it is taking a new financial risk.

5. Rebalance With a Rule, Not a Prediction

Suppose an investor’s target is 70% stocks and 30% fixed income. After a steep equity decline, the allocation might become 60/40. Rebalancing restores the intended risk level by directing contributions to underweight assets or, when necessary, selling part of an overweight holding.

Alex’s situation is different: technology is still too large relative to the written target. Rather than making an all-or-nothing sale, Alex redirects new contributions toward the underweight broad-market holding and schedules a full allocation review.

A practical rule might be to review every six or 12 months, or when an asset class moves five percentage points away from its target. The exact rule matters less than choosing it before emotions take over.

Rebalancing is not blindly buying the dip. It is portfolio maintenance based on a predetermined allocation.

6. Separate a Market Decline From a Broken Investment

A broad index falling because investors fear a recession is different from one company falling after losing a major customer, taking on unsustainable debt or suffering a permanent competitive setback.

The Bank of Canada’s 2020 analysis makes this distinction visible. While the TSX fell broadly, the damage was uneven. By September 10, 2020, Canadian energy shares were down roughly 43% on average from February 19, while analysts had cut their 2021 earnings forecasts for the sector by close to 83%. That was company and sector information—not merely market mood.

Before buying more or continuing to hold, ask:

  • Have revenue, margins or cash flow materially deteriorated?
  • Is debt becoming difficult to service?
  • Has management changed its guidance or strategy?
  • Is the ETF still tracking the index or strategy expected?
  • Would I buy this investment today if I did not already own it?

A lower price makes an investment cheaper than it was. It does not automatically make it good value.

7. Do Not Replace Panic Selling With Yield Chasing

Large dividends and monthly distributions can feel reassuring when prices are falling, but income is only part of the result.

Total return combines distributions with changes in market value. A fund can pay an 8% distribution and still leave an investor worse off if its price falls 15%. On a $10,000 holding, an $800 distribution does not offset a $1,500 decline; before tax, the position is still down approximately $700.

Covered-call ETFs may generate income by selling call options, but the strategy can surrender part of the upside during a strong recovery. An unusually high dividend yield may also be a warning: the yield can rise because the share price is collapsing and investors doubt the dividend will survive.

Compare total return, distribution sustainability, fees, taxes, downside risk, upside participation and portfolio overlap. TwikUp’s guide to covered-call ETF trade-offs explores this in more detail.

The Five-Minute Market-Fall Test

Before trading during a major decline, complete this test:

  1. Goal: Has the purpose of this money changed?
  2. Time: Will I need any of it within five years?
  3. Cash: Are emergencies and essential expenses covered?
  4. Risk: Is the portfolio more concentrated than I realized?
  5. Evidence: Has the investment deteriorated, or only its price?
  6. Process: Does this trade follow a written rule?
  7. Regret test: Would I make the same decision if the price were not flashing red?

If these questions reveal a weak portfolio, the decline has provided useful information. If the plan still fits, continuing it may be the most rational response.

What Alex Actually Does

Alex does not sell everything or make an all-in bet on a rebound.

The emergency fund remains untouched. Price notifications are reduced. Automatic TFSA contributions continue because monthly cash flow is stable. New contributions go to the underweight broad-market ETF, and the technology allocation is reviewed against a written limit.

None of those choices requires predicting tomorrow’s closing price.

That is the central lesson. Long-term investing is usually built on decisions that appear boring in the moment: enough cash, suitable risk, broad diversification, affordable contributions and rules written before fear arrives.

Frequently Asked Questions

Should I sell when the stock market falls?

Not solely because prices are falling. Selling may be appropriate when the money is needed soon, the portfolio is unsuitable or the investment’s fundamentals have materially deteriorated. Fear alone is not a complete investment thesis.

Should I buy more during a crash?

Buying may fit an investor with emergency savings, stable cash flow, a long horizon and suitable risk tolerance. It is not automatically right for everyone, and nobody can identify the market bottom with certainty.

How much does a portfolio need to gain after a loss?

The required recovery grows as the loss deepens. A 10% loss requires an 11.1% gain to break even; a 20% loss requires 25%; a 30% loss requires 42.9%; and a 50% loss requires 100%.

Are ETFs safe during a market decline?

ETFs have different risks. A diversified broad-market ETF can still fall substantially. A leveraged, sector-specific or narrowly concentrated ETF can be much more volatile. Examine the holdings and strategy, not only the ETF label.

How often should I check my portfolio?

Repeated checking can encourage impulsive decisions. A scheduled review, combined with alerts for material company or fund changes, is generally more useful than watching every price movement.

Final Word

A falling market turns uncertainty into a test of portfolio design and investor behaviour.

The fastest reaction is not necessarily the best decision. Slow down, protect near-term needs, measure concentration, investigate what changed and follow a rule you can explain in writing.

Markets will continue to rise and fall. Your financial plan should be built to survive both.

Disclaimer: This article is for general educational and informational purposes only. It does not provide personalized financial, investment, tax or legal advice, and it is not a recommendation to buy, sell or hold any security. Investment values can rise or fall, and investors may lose money. Consider your circumstances and consult a qualified professional when appropriate.

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