Over the years as a stock market participant, I’ve experienced my fair share of ups and downs. In my early days, the 2008 financial crisis was still fresh in everyone’s minds and the idea of another crash was terrifying. 

But as time passed and I began to understand market cycles, that fear slowly evolved into something more like anticipation. Now, I see dips for what they are: opportunities. 

The key is to be prepared before the sell-off starts, because panic and inaction usually do more damage than the fall itself. Smart investors keep a defensive portfolio, watch the market closely, and hold cash so they can buy quality shares when prices are under pressure.

Three steps to prepare

If I want to turn a crash into an opportunity, I start with the basics. First, I keep an emergency fund of six to 12 months’ spending so I’m not forced to sell at the wrong time. Next, I diversify across sectors and asset classes, then rebalance when the mix gets out of line.

And, most importantly, I avoid panic-selling and keep investing steadily. Pound/cost averaging (making regular, small investments) has been proven to be more effective in most cases than trying to time the market.

• Emergency cash stops forced selling.
• Diversification reduces single-stock damage.
• Regular investing removes emotion from the process.

A defensive example

For the core of a portfolio, I like to look at defensive businesses with essential products. One example to consider is Halma (LSE:HLMA), the safety, health and environmental equipment group.

Its business model’s simple to understand: if the products are needed every year, demand tends to be steadier, returns are usually more reliable, and cash generation can be strong.

That has shown up in the numbers. Halma’s share price is up 260% over 10 years, which works out at annualised growth of 13.67%.

Its most recent full-year results were also solid:

• Revenue up 15% to £2.58bn.
• Adjusted EBIT rising 22% to £594.5m.
• EBIT margin of 22.7%.
• Total dividend per share raised 7% to 24.74p.

But even high-quality stocks can become vulnerable when expectations get too high. Halma’s shares fell sharply in early June after results, not because the business was broken, but because the market reassessed the valuation.

Reuters said investors were concerned about slower growth ahead, especially if photonics growth cooled and customer concentration remained high. This shows how even the most boring company has to take risks, and they don’t always pay off.

Why boring can work

Defensive shares are often overlooked because the lack of headline news makes them appear stagnant. They can seem too dull to novice investors, especially compared with fast-growing technology names.

But what matters over time is consistency, not drama. Volatile growth stocks can be fun to own, yet steady compounders often do better over the long run because they keep delivering through different market cycles.

If there’s one lesson here, it’s this: crashes create two things – higher panic and lower prices. Investors who are ready, patient, and properly diversified avoid the one and benefit from the other.

Should you invest £5,000 in Halma Plc right now?

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Mark Hartley does not hold any positions in the companies mentioned.